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The processing of waste oil into diesel-like fuel (DLF) is a challenging issue related to waste management and energy supply. This paper describes an experimental study of compression ignition (CI) engine using blended fuel between diesel and distillation product of used-waste oil. The objective is to evaluate the engine performance and smoke opacity caused by waste-derived fuel (WDF). Using an unmodified CI engine, pure distillation product and blends with diesel were applied to evaluate the engine performance ranging to engine speeds between 1,000 - 5,000 rpm. The results indicated that the physicochemical properties of WDF resemble diesel which could realistically be applied to CI engines. The lower viscosity of WDF provides the advantage of fuel movement and spray consistency inside the combustion chamber, which improved the combustion process. The average engine torque and power increase up to 3.22 and 2.89 %, respectively. At the same time, the average fuel consumption reduces up to 8.31 %. The WDF performs nearly as well as pure diesel when it comes to combustion. The increase in power and thermal efficiency is not particularly significant. However, it remains a viable alternative fuel for CI engines in terms of waste recycling.
Marwan Effendy; Arif Surono; Eqwar Saputra; Nurmuntaha Agung Nugraha. Performance and smoke opacity of compression-ignition engine using used-waste oil. Case Studies in Thermal Engineering 2021, 26, 101063 .
AMA StyleMarwan Effendy, Arif Surono, Eqwar Saputra, Nurmuntaha Agung Nugraha. Performance and smoke opacity of compression-ignition engine using used-waste oil. Case Studies in Thermal Engineering. 2021; 26 ():101063.
Chicago/Turabian StyleMarwan Effendy; Arif Surono; Eqwar Saputra; Nurmuntaha Agung Nugraha. 2021. "Performance and smoke opacity of compression-ignition engine using used-waste oil." Case Studies in Thermal Engineering 26, no. : 101063.
The braking process is the basis in the making of the PWM speed control system in order for electric cars to be able to stop automatically and increase the driving safety. The usage of an electric motor as a wheel drive for an electric car allows controlling with a microcontroller. Based on the journal about electric motor control, it is necessary to study the use of PWM as a speed controller. The C language as a coding language can be understood by the Arduino microcontroller with the aim of regulating the speed of the electric motor. The research objective was to use the C language programming as a PWM speed controller with the Arduino microcontroller. The methodology used in this study was to modify a remote control car (RC) made as a prototype electric car. The Arduino microcontroller system was installed and programmed in C language as a PWM speed controller. The main sensor tool used was the ultrasonic distance sensor as the microcontroller input data. Direct current (DC) motors on RC cars were regulated with a pulse width modulation (PWM) signal as the output from the Arduino. LCD and buzzer were used as display devices and indicators of safe distances between prototypes and obstructions. The test results showed that the detection distance of the ultrasonic sensor reached 2 cm to 500 meters. Then the acceleration data obtained by pulse width modulation 64 at 1 meter distance, 127 at 3 meter distance, 191 at 4 meter distance, 225 at 5 meter distance and was made in graphic form. In a speed control system, the usage of the Arduino UNO microcontroller was easy to apply and had complete features. The series of speed control systems could be applied to electric cars with the PWM slow reduction criteria in two stages. The PWM lowering process took 1 second after the sensor detects an obstruction object.
Dwi Aji Saputra; Bana Handaga; Marwan Effendy; Dimas Ardiansyah Halim. Simulasi Pemograman Pengendali PWM Kecepatan dengan Mikrokontroler Arduino berbasis Sensor Ultrasonik HC-SR04 pada Purwarupa Mobil Listrik. Accurate: Journal of Mechanical Engineering and Science 2020, 1, 19 -25.
AMA StyleDwi Aji Saputra, Bana Handaga, Marwan Effendy, Dimas Ardiansyah Halim. Simulasi Pemograman Pengendali PWM Kecepatan dengan Mikrokontroler Arduino berbasis Sensor Ultrasonik HC-SR04 pada Purwarupa Mobil Listrik. Accurate: Journal of Mechanical Engineering and Science. 2020; 1 (2):19-25.
Chicago/Turabian StyleDwi Aji Saputra; Bana Handaga; Marwan Effendy; Dimas Ardiansyah Halim. 2020. "Simulasi Pemograman Pengendali PWM Kecepatan dengan Mikrokontroler Arduino berbasis Sensor Ultrasonik HC-SR04 pada Purwarupa Mobil Listrik." Accurate: Journal of Mechanical Engineering and Science 1, no. 2: 19-25.
Greenery systems are sustainable ecosystems for buildings. Many studies on greenery systems, such as green roofs and green walls, have demonstrated that greenery systems support energy saving and improve thermal conditions in the building sector. This paper summarizes, discusses, and compares greenery systems and their contributions to the reduction of the urban heat index, the reduction of internal and external buildings’ wall temperatures, and the reduction of the energy consumption of buildings. The fundamental mechanisms of greenery systems, which are thermal insulation, evapotranspiration, and shading effect, are also discussed. The benefits of greenery systems include the improvement of stormwater management, the improvement of air quality, the reduction of sound pollution, the reduction of carbon dioxide, and the improvement of aesthetic building value. The summarized materials on the greenery systems in the article will be a point of references for the researchers, planners, and developers of urban and rural areas, as well as the individual’s interest for future urban and rural plans.
Hussain H. Al-Kayiem; Kelly Koh; Tri W. B. Riyadi; Marwan Effendy. A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment. Sustainability 2020, 12, 8529 .
AMA StyleHussain H. Al-Kayiem, Kelly Koh, Tri W. B. Riyadi, Marwan Effendy. A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment. Sustainability. 2020; 12 (20):8529.
Chicago/Turabian StyleHussain H. Al-Kayiem; Kelly Koh; Tri W. B. Riyadi; Marwan Effendy. 2020. "A Comparative Review on Greenery Ecosystems and Their Impacts on Sustainability of Building Environment." Sustainability 12, no. 20: 8529.
The existence of fossil fuels is increasingly scarce nowadays. Therefore, finding alternative fuels to substitute petroleum fuels, especially gasoline that very huge used for a motor vehicle. One of the alternative fuels as a substitute for gasoline is bioethanol (BE). The aim of the research work was to analyze engine performance and exhaust emission level of vehicle using two different types of spark plug. Further investigation was addressed by varying additional bioethanol fuel made from raw material of cassava. The work was carried out experimentally both in the laboratory and engine test drive. The results show that by using platinum spark plug resulting better performance of engine. The additional bioethanol on fuel, the power, and torque generated from the engine increases with the increase of percent bioethanol in the fuel mixture. The fuel consumption is more efficient by using fuel of 30% BE, compared with engine operation using fuel of 100% pertalite. While the results of the exhaust emission on the vehicle show that by using fuel bioethanol, exhaust emissions decrease as the increase of bioethanol in fuel mixture than exhaust emissions generated when using fuel 100% pertalite. It was proved by statistical data analysis using a one-way ANOVA Varian (F test) for power, torque, and HC emission levels, found of F value less than F table. Therefore hypothesis null (Ho) was accepted. Further result in each variation of fuel there is no significant difference. However, for CO, found that counted F greater than F table, then Ho was rejected; therefore the result of each variation of fuel there is significantly different.
Sarjito; I Prasetyo; T W B Riyadi; A D Anggono; Marwan Effendy. An effect of different spark plug used and additional ethanol on engine performance and exhaust gas emission. IOP Conference Series: Materials Science and Engineering 2019, 674, 012062 .
AMA StyleSarjito, I Prasetyo, T W B Riyadi, A D Anggono, Marwan Effendy. An effect of different spark plug used and additional ethanol on engine performance and exhaust gas emission. IOP Conference Series: Materials Science and Engineering. 2019; 674 (1):012062.
Chicago/Turabian StyleSarjito; I Prasetyo; T W B Riyadi; A D Anggono; Marwan Effendy. 2019. "An effect of different spark plug used and additional ethanol on engine performance and exhaust gas emission." IOP Conference Series: Materials Science and Engineering 674, no. 1: 012062.
Detached eddy simulation (DES) has been carried out to study a three-dimensional trailing-edge (TE) cutback turbine blade model with five rows of staggered circular pin-fin arrays inside the cooling passage, in order to evaluate the cooling performance in relation to coolant ejection slot angle. Simulations were performed by adopting a shear-stress transport k-ω turbulence model, and the effects of three different ejection slot angles 5°, 10° and 15° were investigated in terms of the characteristics of adiabatic film-cooling effectiveness, coefficient of discharge, and vortex shedding frequencies, respectively. The results obtained have shown that the TE cutback blade cooling with a 5° coolant ejection slot angle produced a better heat transfer coefficient than the other two ejection slot angles tested. The distributions of adiabatic film-cooling effectiveness along the cutback walls were found to be sensitive to the coolant ejection slot angle, e.g. the increase of ejection slot angle to 15° yielded near unity of cooling effectiveness along the entire breakout walls, whereas the decrease of ejection slot angle caused a drastic decay of cooling effectiveness after the maximum effectiveness has been reached. Of the three angles studied, a TE cutback blade model with a 15° ejection slot angle produced an optimum film-cooling effectiveness. In the breakout region, vortex shedding was observed along the shear layer between the hot gas and the coolant airflow. The shedding frequencies were evaluated to be 2.93, 2.21, and 2.18 kHz for the ejection slot angles of 5°, 10° and 15°, respectively. The findings from this study could be useful to improve existing TE cutback turbine blade design to achieve optimum film-cooling performance.
M. Effendy; Y.F. Yao; J. Yao; D.R. Marchant. Detached eddy simulation of blade trailing-edge cutback cooling performance at various ejection slot angles. International Journal of Heat and Fluid Flow 2019, 80, 108487 .
AMA StyleM. Effendy, Y.F. Yao, J. Yao, D.R. Marchant. Detached eddy simulation of blade trailing-edge cutback cooling performance at various ejection slot angles. International Journal of Heat and Fluid Flow. 2019; 80 ():108487.
Chicago/Turabian StyleM. Effendy; Y.F. Yao; J. Yao; D.R. Marchant. 2019. "Detached eddy simulation of blade trailing-edge cutback cooling performance at various ejection slot angles." International Journal of Heat and Fluid Flow 80, no. : 108487.
Penelitian ini bertujuan untuk menyelidiki karakteristik aliran di sekitar profil airfoil NACA 4412 dengan eksperimen dan simulasi numerik. Spesimen uji tiga dimensi dari bahan kayu balsa dengan panjang chord 100 mm dan lebar span 200 mm dibuat dalam skala laboratorium untuk keperluan pengujian pada terowongan angin, sedangkan simulasi direalisasikan dengan geometri airfoil dalam bentuk dua dimensi. Sejumlah 810.000 elemen bujursangkar dengan nilai Δy+ hingga 17,2 berhasil dibuat untuk mencapai tingkat keakuratan hasil simulasi keadaan tunak berbasis Reynolds Average Navier Stokes (RANS). Penyelidikan karakteristik aerodinamika dilakukan pada sudut serang (α) antara -5o dan 20o dengan kecepatan udara 10 m/s. Beberapa parameter penting seperti koefisien lift (CL), koefisien drag (CD), rasio lift-drag (L/D), koefisien distribusi tekanan (CP) serta profil aliran udara di sekitar airfoil diselidiki secara seksama. Hasil penelitian menunjukkan bahwa koefisien hambat (CD) dan koefisien angkat (CL) yang diperoleh dengan pendekatan numerik maupun pengujian dalam wind tunnel memiliki kesesuaian dengan data peneliti terdahulu. Seiring dengan peningkatan sudut serang airfoil (α), kedua koefisien tersebut mengalami peningkatan. Penurunan koefisien angkat terjadi secara signifikan pada kondisi stall, yaitu pada saat sudut serang melebihi dari 15°. Perubahan sudut serang berpengaruh terhadap pergeseran titik stagnasi maupun titik ekspansi di daerah leading edge pada permukaan bodi airfoil, yang selanjutnya mempengaruhi karakteristik aerodinamika secara keseluruhan. Semakin besar perbedaan tekanan antara sisi atas dan bawah dari bodi airfoil menghasilkan gaya angkat yang semakin besar.
Marwan Effendy; Muchlisin Muchlisin. Studi Eksperimental dan Simulasi Numerik Karakteristik Aerodinamika Airfoil NACA 4412. ROTASI 2019, 21, 147 -154.
AMA StyleMarwan Effendy, Muchlisin Muchlisin. Studi Eksperimental dan Simulasi Numerik Karakteristik Aerodinamika Airfoil NACA 4412. ROTASI. 2019; 21 (3):147-154.
Chicago/Turabian StyleMarwan Effendy; Muchlisin Muchlisin. 2019. "Studi Eksperimental dan Simulasi Numerik Karakteristik Aerodinamika Airfoil NACA 4412." ROTASI 21, no. 3: 147-154.
Wear occurs in rail wheels due to varying surface contact between wheel and railway. Many materials are used to minimize the wear effect of friction, one of which is graphite. Graphite has been known having dry lubricating ability. To find out the effect of graphite lubrication on wear level of wheel and railway, an experiment-based research is important to conduct. This research started with designing the construction of disc-on-disc wear testing instrument, wheel specimen using EMS45 material and railway specimen using VCL140 material. Dry lubricant used was graphite bar polished onto wheel specimen surface. The result of research showed that graphite could adhere to wheel surface and penetrate into the fissures of contact between wheel and railway. Varying graphite polishing conducted once in 5 minutes and 10 minutes resulted in different volume of graphite filling in the fissures of wheel specimen surface. The more the graphite volume polished onto wheel specimen surface, the less is the material loss due to surface contact. Graphite’s ability of filling in this contact area fissure when administered in appropriate volume would enable graphite to be a good dry lubricant. If this graphite polishing technique is applied to rail wheels, it would be beneficial, as it can lengthen the wheel life.
Joko Suparno; Dimas Ardiansyah Halim; Junaidi; Ady Setiawan; Marwan Effendy; J. Jamari. Graphite as Dry Lubricant to Reduce Rail Wheels Wear Level. Materials Science Forum 2019, 961, 126 -133.
AMA StyleJoko Suparno, Dimas Ardiansyah Halim, Junaidi, Ady Setiawan, Marwan Effendy, J. Jamari. Graphite as Dry Lubricant to Reduce Rail Wheels Wear Level. Materials Science Forum. 2019; 961 ():126-133.
Chicago/Turabian StyleJoko Suparno; Dimas Ardiansyah Halim; Junaidi; Ady Setiawan; Marwan Effendy; J. Jamari. 2019. "Graphite as Dry Lubricant to Reduce Rail Wheels Wear Level." Materials Science Forum 961, no. : 126-133.
Turbine blades are often exposed to the ‘hot’ gas environment and thus it is essential to apply effective cooling technique to extend the blade lifetime. In the present work, wall heat transfer characteristics inside a blade trailing-edge coolant passage were investigated by analyzing two baseline configurations experimentally studied by previous researchers. In addition, three new configurations were proposed by varying shape and orientation against an incoming airflow. All these five configurations adopted similar layout with five-row elliptic pin-fins in the main coolant region and one-row fillet circular pin-fin in the exit region. Validation study was started by two baseline configurations by comparing CFD predictions with experimental measurements, followed by wall heat transfer predictions of three newly proposed configurations. It was found that pin-fin shape and its orientation have considerable effects on the wall heat transfer characteristics, and that by rotating the pin-fin against incoming flow, some compromises could be achieved, such as higher heat transfer coefficient and lower pressure loss.
Marwan Effendy; Yufeng Yao; Jun Yao; Denis R. Marchant. Pin-fin shape and orientation effects on wall heat transfer predictions of gas turbine blade. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2019, 2114, 020008 .
AMA StyleMarwan Effendy, Yufeng Yao, Jun Yao, Denis R. Marchant. Pin-fin shape and orientation effects on wall heat transfer predictions of gas turbine blade. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018. 2019; 2114 (1):020008.
Chicago/Turabian StyleMarwan Effendy; Yufeng Yao; Jun Yao; Denis R. Marchant. 2019. "Pin-fin shape and orientation effects on wall heat transfer predictions of gas turbine blade." EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2114, no. 1: 020008.
This paper describes a numerical study of internal pin-fin cooling performance of a trailing-edge cutback configuration for gas turbine blade. The study was performed at two steps: first, to validate simulation results from an existing TE cutback cooling with staggered pin-fin arrays inside the cooling passage against experimental measurements. Three structured meshes were used for grid convergence and to evaluate film-cooling effectiveness and discharge coefficient; second, to investigate the pin-fin cooling performance with various blowing ratios. Simulations were performed by keeping the same initial and boundary conditions as the corresponding experiment. The results show that validation can be considered acceptable by keeping quality grid and its resolution in near wall regions. Both computational data of the adiabatic film-cooling effectiveness and the discharge coefficient are in fairly good agreement with the test data. The pin-fin array has important roles to promote flow turbulence activity inside the cooling passage, in addition to increase surface areas for heat transfer. Hence the turbulence intensity is more pronounced due to the existence of the pin-fin and it is concomitant with the coolant flow inside the wedge-shaped duct.
Marwan Effendy; Yufeng Yao; Daru Sugati; Tri Tjahjono. Numerical study of pin-fin cooling on gas turbine blades. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2019, 2114, 060022 .
AMA StyleMarwan Effendy, Yufeng Yao, Daru Sugati, Tri Tjahjono. Numerical study of pin-fin cooling on gas turbine blades. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018. 2019; 2114 (1):060022.
Chicago/Turabian StyleMarwan Effendy; Yufeng Yao; Daru Sugati; Tri Tjahjono. 2019. "Numerical study of pin-fin cooling on gas turbine blades." EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2114, no. 1: 060022.
The present study evaluates an experimental study on performance of centrifugal pump. The experimental test section consists of a single-stage centrifugal pump and impeller with various numbers of blade (5, 6 and 7 blades), which is completed by the installation of pressure gauge and rotameter for collecting data of pressure and flow rate, respectively. The operating speed of pump was varied at 1450, 2050, and 2750 revolution per minute (rpm). The effects of different numbers of blade on the impeller and the performance of the centrifugal pump were investigated in terms of head pump (H), hydraulic power (Phydraulic), and efficiency (η). The results clearly demonstrate a strong influence of the rotational speed on the performance of centrifugal pump. All performance parameters tend to be sensitive against the change in the rotational speed rather than the change in the number of blade. The flow rate of pump operation is a key important role on the performance of head, power and efficiency. The use of impeller with various numbers of blade does not contribute a significant effect on the performance of centrifugal pump.
Subroto; Marwan Effendy. Optimization of centrifugal pump performance with various blade number. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2019, 2114, 020016 .
AMA StyleSubroto, Marwan Effendy. Optimization of centrifugal pump performance with various blade number. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018. 2019; 2114 (1):020016.
Chicago/Turabian StyleSubroto; Marwan Effendy. 2019. "Optimization of centrifugal pump performance with various blade number." EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2114, no. 1: 020016.
The present study describes the research of railway wear and investigation of the effect of graphite on the surface of the wheel on its wear level. The first stage in this experiment is to design wear test equipment with disc-on-disc contact system that can be used to testing the wear of disc-shaped specimens with dimensions between 75-80 mm. Rotational speed varies between 30 - 400 rpm with pressure between 300—2000 MPa. Validation of the equipment is done by comparing the slip ratio data, the coefficient of friction and the depth of wear on previous similar studies. The second stage is to test the wear rate of the disc specimen with a diameter of 78 mm hardness of 199 BHN at a variation of velocity 0.5 ; 1.0 and 1.5 m/s. The effect of graphite on wear is also investigated at each of these speed tests. The results of the data analysis of wear indicate that the velocity affects the wear. The higher the velocity, the higher the wear rate. Graphite loading on test specimens will reduce wear rate by 175% - 600%.
Junaidi; Joko Suparno; Dimas Halim Ardiansyah; Marwan Effendy; Jamari. Improvement of wear resistant of railway wheel by using graphite in various speeds based on disc-on-disc contact system. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2019, 2114, 040005 .
AMA StyleJunaidi, Joko Suparno, Dimas Halim Ardiansyah, Marwan Effendy, Jamari. Improvement of wear resistant of railway wheel by using graphite in various speeds based on disc-on-disc contact system. EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018. 2019; 2114 (1):040005.
Chicago/Turabian StyleJunaidi; Joko Suparno; Dimas Halim Ardiansyah; Marwan Effendy; Jamari. 2019. "Improvement of wear resistant of railway wheel by using graphite in various speeds based on disc-on-disc contact system." EXPLORING RESOURCES, PROCESS AND DESIGN FOR SUSTAINABLE URBAN DEVELOPMENT: Proceedings of the 5th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2018 2114, no. 1: 040005.
Separator siklon silinder vertikal (Gas Liquid Cylindrical Cyclones) merupakan alat pemisahan aliran multifase yang umum dipergunakan dalam industri perminyakan. Penelitian ini bertujuan untuk mengevaluasi unjuk kerja dan perilaku hidrodinamika fluida separator GLCC metering loop pada pemisahan aliran campuran udara dan air. Eksperimen dilakukan dengan membuat separator skala uji laboratorium menggunakan pipa acrylic plexyglass diameter 6,25 cm, tinggi 140 cm dengan sistem inlet tangensial pada sudut inklinasi 30o, serta dilengkapi 5 variasi posisi saluran keluaran. Percobaan dilakukan dengan memvariasikan debit udara dan efek posisi saluran keluaran (recombination point). Beberapa aspek penting seperti kecepatan superficial gas (Vsg), kecepatan superficial cairan (Vsl), level cairan kesetimbangan (Leq), liquid carry over (LCO) dan gas carry under (GCU) menjadi perhatian selama percobaan. Hasil penelitian menunjukkan bahwa empat regim aliran yaitu aliran gelembung (bubble flow), aliran gelembung paket (packed bubble flow), aliran kantung gas atau sumbat cair (slug flow) dan aliran acak (churn flow) dipengaruhi oleh konfigurasi rasio aliran gas-cairan dan posisi rekombinasinya. Rasio kecepatan superfisial antara udara dan cairan memainkan peran penting terhadap terbentuknya regim aliran dan ketinggian level cairan kesetimbangan.
Marwan Effendy. Unjuk Kerja Separator Gas Liquid Cylindical Cyclone (GLCC Metering Loop). ROTASI 2019, 21, 68 -75.
AMA StyleMarwan Effendy. Unjuk Kerja Separator Gas Liquid Cylindical Cyclone (GLCC Metering Loop). ROTASI. 2019; 21 (2):68-75.
Chicago/Turabian StyleMarwan Effendy. 2019. "Unjuk Kerja Separator Gas Liquid Cylindical Cyclone (GLCC Metering Loop)." ROTASI 21, no. 2: 68-75.
Penelitian ini bertujuan untuk mengevaluasi penggunaan model turbulensi Detached Eddy Simulation Spallart-Almaras (DES-SA) pada studi numerik tentang sistem pendinginan trailing edge (TE) pada sudu turbin gas. Sebuah desain TE cutback cooling dengan susunan staggered pin-fin dipilih sebagai spesimen pengujian berbasis simulasi. Tiga parameter penting seperti discharge coefficient (CD), adiabatic film cooling effectiveness (ηaw), dan shedding frequency (fs) menjadi fokus utama dalam penyelidikan kinerja sistem pendinginan TE sudu turbin gas. Penelitian dilakukan pada variasi tiga blowing ratios (M) yaitu 0,5; 0,8; dan 1,1. Hasil riset menunjukkan bahwa nilai CD yang diperoleh dari hasil simulasi memiliki kesesuaian trend jika dibandingkan dengan data peneliti terdahulu, dimana nilai CD sedikit meningkat seiring dengan M yang semakin besar. Penyelidikan terkait ηaw yang terjadi pada permukaan adiabatic wall menunjukkan bahwa nilainya konsisten dengan data penelitian yang terdahulu, baik secara eksperimen maupun simulasi. Frekuensi aliran vorteks (fs) berturut-turut 2043, 2323, dan 1976 Hz untuk masing-masing blowing ratios 0,5; 0,8; dan 1,1.
Agus Jamaldi; Marwan Effendy. Kajian Numerik Efektifitas Film Cooling pada Sudu Turbin Gas. ROTASI 2019, 21, 10 -15.
AMA StyleAgus Jamaldi, Marwan Effendy. Kajian Numerik Efektifitas Film Cooling pada Sudu Turbin Gas. ROTASI. 2019; 21 (1):10-15.
Chicago/Turabian StyleAgus Jamaldi; Marwan Effendy. 2019. "Kajian Numerik Efektifitas Film Cooling pada Sudu Turbin Gas." ROTASI 21, no. 1: 10-15.
This paper presents a numerical study on prediction of the performance of liquid jet gas ejector. RANS study using the k-ε turbulence model has been carried out for an experimental model of ejector as published by researcher in previous paper. This simulation considered a high quality of the structured mesh up to Δy+ <1 near the walls. The phenomenon of mixing process between liquid and gas in the throat section was investigated carefully, which is to be correlated to the pressure profile along the throat section. CFD predicted static pressure distribution is in good agreement with available experimental measurements.
Daru Sugati; Marwan Effendy. RANS study of the liquid jet gas ejector. DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017) 2018, 1983, 020006 .
AMA StyleDaru Sugati, Marwan Effendy. RANS study of the liquid jet gas ejector. DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017). 2018; 1983 (1):020006.
Chicago/Turabian StyleDaru Sugati; Marwan Effendy. 2018. "RANS study of the liquid jet gas ejector." DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017) 1983, no. 1: 020006.
The AIP Proceedings article template has many predefined paragraph styles for you to use/apply as you write your paper. To format your abstract, use the Microsoft Word template style: Each paper must include an Begin the abstract with the word “Abstract” followed by a period in bold font, and then continue with a normal 9 point font.
Daru Sugati; Indarto; Purnomo; Sutrisno; Marwan Effendy; Eka Yawara. Identification performance of the liquid-gas ejector using static pressure distribution. DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017) 2018, 1983, 020013 .
AMA StyleDaru Sugati, Indarto, Purnomo, Sutrisno, Marwan Effendy, Eka Yawara. Identification performance of the liquid-gas ejector using static pressure distribution. DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017). 2018; 1983 (1):020013.
Chicago/Turabian StyleDaru Sugati; Indarto; Purnomo; Sutrisno; Marwan Effendy; Eka Yawara. 2018. "Identification performance of the liquid-gas ejector using static pressure distribution." DISRUPTIVE INNOVATION IN MECHANICAL ENGINEERING FOR INDUSTRY COMPETITIVENESS: Proceedings of the 3rd International Conference on Mechanical Engineering (ICOME 2017) 1983, no. 1: 020013.
In this paper, domain discretization in dealing with domain integral in material nonlinearity plate bending analysis with boundary element method is presented. The domain discretization is conducted by using 9-nodes quadrilateral cells. The semi-discontinuous cell of 9-nodes quadrilateral cell is presented in order to avoid the coincident in between boundary element point and domain element point. The nonlinear term in the formula is analysed by considering that the material is assumed to undergo small strains. The von Mises criterion is used to evaluate the plastic zone and elastic perfectly plastic material behaviour is assumed. A total incremental method is implemented to solve the nonlinear system of equation. The numbers of boundary and domain cells are varied to study the convergence of the analysis. The number of boundary and domain cells has an influence on the accuracy of the results. The increased number of boundary and domain cells gives better results, however a relative coarser mesh can be implemented to have a good results. The current results have a good agreement with the previous results by other researchers.
Supriyono; Marwan Effendy; Wijianto. Domain discretization in dealing with domain integral in material nonlinearity plate bending analysis with boundary element method. HUMAN-DEDICATED SUSTAINABLE PRODUCT AND PROCESS DESIGN: MATERIALS, RESOURCES, AND ENERGY: Proceedings of the 4th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2017 2018, 1977, 020055 .
AMA StyleSupriyono, Marwan Effendy, Wijianto. Domain discretization in dealing with domain integral in material nonlinearity plate bending analysis with boundary element method. HUMAN-DEDICATED SUSTAINABLE PRODUCT AND PROCESS DESIGN: MATERIALS, RESOURCES, AND ENERGY: Proceedings of the 4th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2017. 2018; 1977 (1):020055.
Chicago/Turabian StyleSupriyono; Marwan Effendy; Wijianto. 2018. "Domain discretization in dealing with domain integral in material nonlinearity plate bending analysis with boundary element method." HUMAN-DEDICATED SUSTAINABLE PRODUCT AND PROCESS DESIGN: MATERIALS, RESOURCES, AND ENERGY: Proceedings of the 4th International Conference on Engineering, Technology, and Industrial Application (ICETIA) 2017 1977, no. 1: 020055.
Reverse engineering has been widely used in the design and manufacturing processes of mechanical parts. The CAD model of reverse-engineered parts can be modified and redesigned to create a scale model of an existing part. The objectives of this project were to re-evaluate a reverse-engineered CAD model and create a scale model by machining process obtained from a CAM design. Initially, the digitization of an object was performed using 3D scanning devices. Re-evaluation of the designed part was executed using Geomagic Design software. NX software was used for generating a CAM design. Finally, the machining process of the real scale part was conducted using CNC 3 Axis. This work has contributed to the practical education for the abilities of a 3D scanner used in reverse engineering.
Tri Widodo Besar Riyadi; Yoshrizal Hary Yulianto; Marwan Effendy; Sarjito; Zhang Zheng; Tang Li Ping. Evaluation on a Digitized CAD Model of 3D Scanner Used in Reverse Engineering. 2018 12th South East Asian Technical University Consortium (SEATUC) 2018, 1, 1 -5.
AMA StyleTri Widodo Besar Riyadi, Yoshrizal Hary Yulianto, Marwan Effendy, Sarjito, Zhang Zheng, Tang Li Ping. Evaluation on a Digitized CAD Model of 3D Scanner Used in Reverse Engineering. 2018 12th South East Asian Technical University Consortium (SEATUC). 2018; 1 ():1-5.
Chicago/Turabian StyleTri Widodo Besar Riyadi; Yoshrizal Hary Yulianto; Marwan Effendy; Sarjito; Zhang Zheng; Tang Li Ping. 2018. "Evaluation on a Digitized CAD Model of 3D Scanner Used in Reverse Engineering." 2018 12th South East Asian Technical University Consortium (SEATUC) 1, no. : 1-5.
This research evaluates the cooling performance of trailing-edge cutback for gas turbine blade. By using DES based on SST k-ω turbulence model, numerical investigations were performed at two steps: first, to validate simulation results from an existing TE cutback cooling with staggered pin-fin arrays inside the cooling passage against experimental measurement. Three types structured mesh from coarse (Δy+ = 0.74) to fine (Δy+ = 1.22) were evaluated during this step; second, to investigate the TE cutback cooling performance on various blowing ratios. Simulations were performed by keeping the same initials and boundary conditions as the experiment. The result indicates that validation can be considered acceptable by controlling grid quality resolution near wall regions. Both computational data of the adiabatic film-cooling effectiveness and the discharge coefficient are in good agreement with available experimental measurements. The averaged film-cooling effectiveness along the cutback region is highly influenced by the blowing ratios, which is to be related to the turbulent flow structures formed at the mixing region as the impact of coolant flow ejection. The increase of coolant jet velocity triggers the heat transfer process up to the downstream region of TE cutback cooling.
Marwan Effendy; Yufeng Yao; Denis R. Marchant. Detached-Eddy Simulation of Trailing-Edge (TE) Cutback Turbine Blade Cooling. MATEC Web of Conferences 2017, 135, 8 .
AMA StyleMarwan Effendy, Yufeng Yao, Denis R. Marchant. Detached-Eddy Simulation of Trailing-Edge (TE) Cutback Turbine Blade Cooling. MATEC Web of Conferences. 2017; 135 ():8.
Chicago/Turabian StyleMarwan Effendy; Yufeng Yao; Denis R. Marchant. 2017. "Detached-Eddy Simulation of Trailing-Edge (TE) Cutback Turbine Blade Cooling." MATEC Web of Conferences 135, no. : 8.
Supriyono; Marwan Effendy; Wijianto. Material nonlinearity plate bending analysis with boundary element method. GREEN PROCESS, MATERIAL, AND ENERGY: A SUSTAINABLE SOLUTION FOR CLIMATE CHANGE: Proceedings of the 3rd International Conference on Engineering, Technology, and Industrial Application (ICETIA 2016) 2017, 1855, 30023 .
AMA StyleSupriyono, Marwan Effendy, Wijianto. Material nonlinearity plate bending analysis with boundary element method. GREEN PROCESS, MATERIAL, AND ENERGY: A SUSTAINABLE SOLUTION FOR CLIMATE CHANGE: Proceedings of the 3rd International Conference on Engineering, Technology, and Industrial Application (ICETIA 2016). 2017; 1855 ():30023.
Chicago/Turabian StyleSupriyono; Marwan Effendy; Wijianto. 2017. "Material nonlinearity plate bending analysis with boundary element method." GREEN PROCESS, MATERIAL, AND ENERGY: A SUSTAINABLE SOLUTION FOR CLIMATE CHANGE: Proceedings of the 3rd International Conference on Engineering, Technology, and Industrial Application (ICETIA 2016) 1855, no. : 30023.
• Detached-eddy simulation of the mixing process between mainstream flow and coolant; • Effects of various t/H ratios on blade trailing-edge cutback cooling performance; • Vortex shedding behind the lip plays an important role in near wall cooling efficiency; • Discharge coefficient and adiabatic film-cooling effectiveness agree with experiment; • Thermal mixing has been greatly intensified with the increase of the t/H ratio. Three-dimensional detached-eddy simulation (DES) study has been carried out to evaluate the cooling performance of a trailing-edge cutback turbine blade with various lip thickness to slot height ratios (t/H). By adopting the shear-stress transport (SST) k-ω turbulence model, the numerical investigations were performed at two successive steps: first, to validate simulation results from an existing cutback turbine blade model with staggered circular pin-fins arrays inside the cooling passage against experimental measurements and other available numerical predictions; second, to understand the effects of the lip thickness to the slot height ratio on the blade trailing-edge cooling performance. It was found from the model validations that at two moderate blowing ratios of 0.5 and 1.1, DES predicted film cooling effectiveness are in very good agreement with experimental data. Further comparisons of four various t/H ratios (t/H = 0.25, 0.5, 1.0, 1.5) have revealed that the thermal mixing process between the ‘cold’ coolant gas and the ‘hot’ mainstream flow in the near wake region of the exit slot has been greatly intensified with the increase of the t/H ratio. As a result, it causes a rapid decay of the adiabatic film cooling effectiveness downstream of the blade trailing-edge. The observed vortex shedding and its characteristics in the near wake region are found to play an important role in determining the dynamic process of the ‘cold’ and the ‘warm’ airflow mixing, which in turn have significant influences on the prediction accuracy of the near-wall heat transfer performance. As the four t/H ratio increases from 0.25 to 1.5, DES predicts the decrease of main shedding frequencies as fs = 3.69, 3.2, 2.21, and 1.49 kHz, corresponding to Strouhal numbers St = 0.15, 0.20, 0.23, and 0.22, respectively. These results are in good agreement with available experimental measurements.
M. Effendy; Y.F. Yao; J. Yao; D.R. Marchant. DES study of blade trailing edge cutback cooling performance with various lip thicknesses. Applied Thermal Engineering 2016, 99, 434 -445.
AMA StyleM. Effendy, Y.F. Yao, J. Yao, D.R. Marchant. DES study of blade trailing edge cutback cooling performance with various lip thicknesses. Applied Thermal Engineering. 2016; 99 ():434-445.
Chicago/Turabian StyleM. Effendy; Y.F. Yao; J. Yao; D.R. Marchant. 2016. "DES study of blade trailing edge cutback cooling performance with various lip thicknesses." Applied Thermal Engineering 99, no. : 434-445.