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Christopher Ellis; Hao Xia; Gary Page. LES Informed Data-Driven Modelling of a Spatially Varying Turbulent Diffusivity Coefficient in Film Cooling Flows. 2021, 1 .
AMA StyleChristopher Ellis, Hao Xia, Gary Page. LES Informed Data-Driven Modelling of a Spatially Varying Turbulent Diffusivity Coefficient in Film Cooling Flows. . 2021; ():1.
Chicago/Turabian StyleChristopher Ellis; Hao Xia; Gary Page. 2021. "LES Informed Data-Driven Modelling of a Spatially Varying Turbulent Diffusivity Coefficient in Film Cooling Flows." , no. : 1.
Jet noise remains a key target for aircraft noise reduction in the foreseeable future. While being extremely challenging, the requirement of predicting both low and high frequency noise spectra is increasingly important for design purposes. Novel approaches are needed to overcome the current numerical limitations in capturing the required broad noise spectra. Once sufficiently resolved, the energy contents of the numerically simulated near- and far-field sound pressure have intrinsic correlations among different levels of grid resolution. The present work explores the novel potential of such correlations to broaden the spectral prediction. The noise radiated from high subsonic turbulent jets is investigated using large-eddy simulation. The 3-D filtered compressible Navier-Stokes solutions are obtained for an axisymmetric and a serrated nozzle on successively refined multi-resolution grids, ranging from 5 to 80 million grid points. The radiated far-field sound is computed using the Ffowcs Williams – Hawkings (FW-H) surface integral method. Fourier decomposition for pressure near-field is applied to help identify the location of the sound source regions and the dominant directions of propagation, which provides a more thorough understanding of the effect of the grid resolution on the numerical cut-off frequencies of the far-field spectra. Further analysis of the far-field spectra and of their azimuthal modes confirms that a novel strategy to obtain a broadened overall sound spectrum is possible, at reduced computational cost, from a combination of multiple spectra from successively refined grids.
M. Angelino; Hao Xia; G.J. Page. Influence of grid resolution on the spectral characteristics of noise radiated from turbulent jets: Sound pressure fields and their decomposition. Computers & Fluids 2019, 196, 104343 .
AMA StyleM. Angelino, Hao Xia, G.J. Page. Influence of grid resolution on the spectral characteristics of noise radiated from turbulent jets: Sound pressure fields and their decomposition. Computers & Fluids. 2019; 196 ():104343.
Chicago/Turabian StyleM. Angelino; Hao Xia; G.J. Page. 2019. "Influence of grid resolution on the spectral characteristics of noise radiated from turbulent jets: Sound pressure fields and their decomposition." Computers & Fluids 196, no. : 104343.
Flow passing a heated square cylinder is investigated using a hybrid LES-RANS approach on unstructured grids at a moderate Reynolds number of 22, 050. The effects of inflow turbulence on the flow field as well as surface convective heat transfer are studied by adopting a grid-based random-number method (GRM). Validation of the GRM method is carried out by generating and simulating a decaying homogeneous isotropic turbulent flow. Analysis of the turbulent quantities and comparisons with the Synthetic Coherent Eddy Method (SCEM) suggest that the cheaper GRM is able to generate good quality inflow turbulence, despite a longer transition region is required. Studies of the heated square cylinder in crossflow show that the inflow turbulence results in an early breakup of the shear layer, which leads to further effects on the vortex shedding and surface heat transfer. The surface convective heat transfer is increased with inflow turbulence, especially on the front, top and bottom surfaces, while limited influence is found on the rear surface. It is shown by the spectra that the effects of the inflow turbulence mainly focus on the turbulent shear layers, as well as heat transfer of the corresponding surfaces.
X. Chen; Hao Xia. Flow and surface heat transfer analysis of a square cylinder in turbulent cross-flow. Numerical Heat Transfer, Part A: Applications 2019, 75, 795 -823.
AMA StyleX. Chen, Hao Xia. Flow and surface heat transfer analysis of a square cylinder in turbulent cross-flow. Numerical Heat Transfer, Part A: Applications. 2019; 75 (12):795-823.
Chicago/Turabian StyleX. Chen; Hao Xia. 2019. "Flow and surface heat transfer analysis of a square cylinder in turbulent cross-flow." Numerical Heat Transfer, Part A: Applications 75, no. 12: 795-823.
A multi-row effusion cooling configuration with scaled gas turbine combustor conditions is studied numerically, using a novel wall-proximity-based hybrid LES-RANS approach. The distribution of the coolant film is examined by surface adiabatic cooling effectiveness (ACE). Simulation results have shown that the accuracy of cooling effectiveness prediction is closely related to the resolution of turbulent flow structures involved in hot-cold flow mixing, especially those close to the plate surface. The formation of the coolant film in the streamwise direction is investigated. It is shown that the plate surface directly downstream the coolant holes are covered well by the coolant jets, while surface regions in between the two columns of the coolant holes could not be protected until the coolant film is developed sufficiently in the spanwise direction in the downstream region. More detailed study has also been carried out to study the time-averaged and time-dependent flow fields. The relation between the turbulent flow structures and coolant film distribution are also examined. The Kelvin–Helmholtz instability in the upper and lower coolant jet shear layer, is found to have the same frequency of around 8000 Hz, and is independent of the coolant hole position. Additionally, it is suggested by the spectral coherence analysis that those unsteady flow structures from the lower shear layer are closely related to the near wall flow temperature, and such effect is also independent of the coolant hole position.
X. Chen; Hao Xia. Hybrid LES-RANS study of an effusion cooling array with circular holes. International Journal of Heat and Fluid Flow 2019, 77, 171 -185.
AMA StyleX. Chen, Hao Xia. Hybrid LES-RANS study of an effusion cooling array with circular holes. International Journal of Heat and Fluid Flow. 2019; 77 ():171-185.
Chicago/Turabian StyleX. Chen; Hao Xia. 2019. "Hybrid LES-RANS study of an effusion cooling array with circular holes." International Journal of Heat and Fluid Flow 77, no. : 171-185.
For vehicles with a squareback geometry, for example Sports Utility Vehicles (SUVs), base pressure drag is a large contributor to overall drag. Simple passive techniques, such as tapering, can reduce drag significantly but at a large aesthetic and functional cost. Therefore, very small base geometry changes have been investigated. An experimentally validated methodology has used Detached Eddy Simulations (DES) to obtain time-averaged and instantaneous data; allowing the effect of horizontal base slats on global forces and wake structures to be presented. The small geometry modifications have caused substantial changes to the base pressure distribution with the main mechanisms of change being identified and observed close to the model surfaces. A region of separation is seen below each slat corresponding to reduced pressure whilst high pressure regions attributed to stagnation are increased. The combined effect is a statistically significant drag reduction of 4 counts (1 count = 0.001 CD) when a slat is added at 3/4 of the base height. The results show the scope for very small changes to a simplified road vehicle, in areas that have not previously been explored, to reduce overall drag with minimal aesthetic penalties. This understanding provides the impetus for new approaches in real vehicle development.
S. Luckhurst; M. Varney; Hao Xia; M.A. Passmore; A. Gaylard. Computational investigation into the sensitivity of a simplified vehicle wake to small base geometry changes. Journal of Wind Engineering and Industrial Aerodynamics 2018, 185, 1 -15.
AMA StyleS. Luckhurst, M. Varney, Hao Xia, M.A. Passmore, A. Gaylard. Computational investigation into the sensitivity of a simplified vehicle wake to small base geometry changes. Journal of Wind Engineering and Industrial Aerodynamics. 2018; 185 ():1-15.
Chicago/Turabian StyleS. Luckhurst; M. Varney; Hao Xia; M.A. Passmore; A. Gaylard. 2018. "Computational investigation into the sensitivity of a simplified vehicle wake to small base geometry changes." Journal of Wind Engineering and Industrial Aerodynamics 185, no. : 1-15.
Matteo Angelino; Hao Xia; Gary J. Page. Adaptive Wall-Modelled Large Eddy Simulation of Jet Noise in Isolated and Installed Configurations. 2018 AIAA/CEAS Aeroacoustics Conference 2018, 1 .
AMA StyleMatteo Angelino, Hao Xia, Gary J. Page. Adaptive Wall-Modelled Large Eddy Simulation of Jet Noise in Isolated and Installed Configurations. 2018 AIAA/CEAS Aeroacoustics Conference. 2018; ():1.
Chicago/Turabian StyleMatteo Angelino; Hao Xia; Gary J. Page. 2018. "Adaptive Wall-Modelled Large Eddy Simulation of Jet Noise in Isolated and Installed Configurations." 2018 AIAA/CEAS Aeroacoustics Conference , no. : 1.
Electrocardiogram (ECG) signal denoising is an important preprocessing for ECG signal analysis. The contaminated ECG signal can be considered as the combination of the desired clean signal and the noise. Thus, ECG signal denoising can be considered as a problem of obtaining an optimal solution to the desired clean signal. In this paper, an effective optimization scheme for ECG signal denoising is presented based on low-rank matrix decomposition. First, the ECG denoising problem is formulated as low-rank matrix decomposition. So, an ECG beats matrix is assumed to be the combination of a sparse noise matrix and a low-rank matrix. Considering the repeatability of ECG signal, the rank of the ECG beats matrix is assumed to be one. Then, to fully exploit the low-rank property of the ECG signal, the matrix decomposition is modified by means of adding different weights to different singular values. Finally, the desired clean ECG signal is reconstructed by the low-rank component. The experimental results show that the proposed denoising method achieves the best performance of suppressing the electromyographic noise in the ECG signals compared with other optimization models.
Qian Ye; Nian Cai; Hao Xia; Guandong Cen; Xindu Chen; Han Wang. An Effective Optimization Scheme for ECG Signal Denoising via Low-Rank Matrix Decomposition. Circuits, Systems, and Signal Processing 2018, 38, 138 -152.
AMA StyleQian Ye, Nian Cai, Hao Xia, Guandong Cen, Xindu Chen, Han Wang. An Effective Optimization Scheme for ECG Signal Denoising via Low-Rank Matrix Decomposition. Circuits, Systems, and Signal Processing. 2018; 38 (1):138-152.
Chicago/Turabian StyleQian Ye; Nian Cai; Hao Xia; Guandong Cen; Xindu Chen; Han Wang. 2018. "An Effective Optimization Scheme for ECG Signal Denoising via Low-Rank Matrix Decomposition." Circuits, Systems, and Signal Processing 38, no. 1: 138-152.
This paper was accepted for publication in the journal International Journal of Heat and Mass Transfer and the definitive published version is available at http://dx.doi.org/10.1016/j.ijheatmasstransfer.2016.10.081Flow passing a heated square cylinder is investigated using a hybrid LES-RANS approach on unstructured grids at a moderate Reynolds number of 22, 050. The implicit SGS is applied for LES and two turbulence models are tested for near-wall RANS: the Spalart-Allmaras model and the SST k-! model. Both models combined with the LES present good predictions of the time- and phase-averaged velocity profiles on a 4-million-cell grid. Results of the LES-SST approach agree better with the experimental data especially at locations close to the cylinder surface and this leads to improved surface convective heat transfer compared to LES-SA. Grid convergence study shows that grid resolution in the near-wall region and on the cylinder surfaces is important in resolving the unsteady convective heat transfer. Results of velocity field and surface heat transfer from the fine grid with 8 million cells compare favourably with the experimental data and show significant improvement over that of the medium and coarse grids. Analysis of turbulent statistics is performed by means of energy spectra and anisotropy invariants of the Reynolds stress tensor. Proper orthogonal decomposition (POD) is used to identify the vortex shedding phases. It is shown that the POD based phase-averaging produces more accurate velocity profiles than the conventional pressure-signal based method
X. Chen; H. Xia. A hybrid LES-RANS study on square cylinder unsteady heat transfer. International Journal of Heat and Mass Transfer 2017, 108, 1237 -1254.
AMA StyleX. Chen, H. Xia. A hybrid LES-RANS study on square cylinder unsteady heat transfer. International Journal of Heat and Mass Transfer. 2017; 108 ():1237-1254.
Chicago/Turabian StyleX. Chen; H. Xia. 2017. "A hybrid LES-RANS study on square cylinder unsteady heat transfer." International Journal of Heat and Mass Transfer 108, no. : 1237-1254.
This paper was presented at the 22nd AIAA/CEAS Aeroacoustics Conference and the definitive published version is available at http://dx.doi.org/10.2514/6.2016-3047Turbulent jet large-eddy simulations (LES) are performed at Mach 0.9 and Reynolds\ud number of 106. For subgrid scale stress modeling the σ-model is used. Solutions are obtained for a baseline axisymmetric (round) nozzle and a serrated (or chevron) nozzle with high bending and penetration, on grids ranging from 5 to 80 million grid points in order to assess the correlation between coarser and finer grid solutions. Computed mean and second-order fluctuating quantities of the turbulent near field compare favorably with measurements. The radiated far-field sound is predicted using the Ffowcs Williams and Hawkings (FW-H) surface integral method. Remarkable agreement of the predicted farfield sound directivity and spectra with measurements is obtained. A preliminary discussion is presented on the correlation and possible combination of multiple spectra from different grids
Matteo Angelino; Hao Xia; Miguel Moratilla-Vega; Gary Page. Far-field Noise Prediction of Round and Serrated Jets with Increasingly Refined Grids. 22nd AIAA/CEAS Aeroacoustics Conference 2016, 1 .
AMA StyleMatteo Angelino, Hao Xia, Miguel Moratilla-Vega, Gary Page. Far-field Noise Prediction of Round and Serrated Jets with Increasingly Refined Grids. 22nd AIAA/CEAS Aeroacoustics Conference. 2016; ():1.
Chicago/Turabian StyleMatteo Angelino; Hao Xia; Miguel Moratilla-Vega; Gary Page. 2016. "Far-field Noise Prediction of Round and Serrated Jets with Increasingly Refined Grids." 22nd AIAA/CEAS Aeroacoustics Conference , no. : 1.
Mahak Mahak; Miguel Moratilla-Vega; Gary Page; Hao Xia. Assessment of WALE and Sigma(σ) Sub-Grid Scale Models for Jet Noise Prediction. 22nd AIAA/CEAS Aeroacoustics Conference 2016, 1 .
AMA StyleMahak Mahak, Miguel Moratilla-Vega, Gary Page, Hao Xia. Assessment of WALE and Sigma(σ) Sub-Grid Scale Models for Jet Noise Prediction. 22nd AIAA/CEAS Aeroacoustics Conference. 2016; ():1.
Chicago/Turabian StyleMahak Mahak; Miguel Moratilla-Vega; Gary Page; Hao Xia. 2016. "Assessment of WALE and Sigma(σ) Sub-Grid Scale Models for Jet Noise Prediction." 22nd AIAA/CEAS Aeroacoustics Conference , no. : 1.
We study the viscous spatial linear stability characteristics of the time-averaged flow in turbulent subsonic jets issuing from serrated (chevroned) nozzles, and compare them to analogous round jet results. Linear parabolized stability equations (PSE) are used in the calculations to account for the non-parallel base flow. By exploiting the symmetries of the mean flow due to the regular arrangement of serrations, we obtain a series of coupled two-dimensional PSE problems from the original three-dimensional problem. This reduces the solution cost and manifests the symmetries of the stability modes. In the parallel-flow linear stability theory (LST) calculations that are performed near the nozzle to initiate the PSE, we find that the serrated nozzle reduces the growth rates of the most unstable eigenmodes of the jet, but their phase speeds are approximately similar. We obtain encouraging validation of our linear PSE instability wave results vis-à-vis near-field hydrodynamic pressure data acquired on a phased microphone array in experiments, after filtering the latter with proper orthogonal decomposition (POD) to extract the energetically dominant coherent part. Additionally, a large-eddy simulation database of the same serrated jet is investigated, and its POD-filtered pressure field is found to compare favourably with the corresponding PSE solution within the jet plume. We conclude that the coherent hydrodynamic pressure fluctuations of jets from both round and serrated nozzles are reasonably consistent with the linear instability modes of the turbulent mean flow.
Aniruddha Sinha; Kristján Gudmundsson; Hao Xia; Tim Colonius. Parabolized stability analysis of jets from serrated nozzles. Journal of Fluid Mechanics 2016, 789, 36 -63.
AMA StyleAniruddha Sinha, Kristján Gudmundsson, Hao Xia, Tim Colonius. Parabolized stability analysis of jets from serrated nozzles. Journal of Fluid Mechanics. 2016; 789 ():36-63.
Chicago/Turabian StyleAniruddha Sinha; Kristján Gudmundsson; Hao Xia; Tim Colonius. 2016. "Parabolized stability analysis of jets from serrated nozzles." Journal of Fluid Mechanics 789, no. : 36-63.
Jets issuing from serrated nozzles have a correspondingly serrated time-averaged flow field. We solve the mildly non-parallel linear parabolized stability problem for such high speed turbulent jets to model the coherent wavepackets in the flow. The base flow for the analysis is the mean flow field from a large-eddy simulation database of a cold Mach 0.9 fully turbulent jet issuing from a nozzle with six serrations, a benchmark case in the literature. The fluctuation data is also filtered to extract the most-energetic coherent part using proper orthogonal decomposition. Such filtered data is shown to bear an encouraging resemblance with the predicted wavepackets.
Aniruddha Sinha; Hao Xia; Tim Colonius. Parabolized Stability Analysis of Jets Issuing from Serrated Nozzles. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) 2015, 211 -215.
AMA StyleAniruddha Sinha, Hao Xia, Tim Colonius. Parabolized Stability Analysis of Jets Issuing from Serrated Nozzles. Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020). 2015; ():211-215.
Chicago/Turabian StyleAniruddha Sinha; Hao Xia; Tim Colonius. 2015. "Parabolized Stability Analysis of Jets Issuing from Serrated Nozzles." Proceedings of the 2nd Annual International Conference on Material, Machines and Methods for Sustainable Development (MMMS2020) , no. : 211-215.
This paper investigates numerically the acoustic sources and far-field noise of chevron and round jets. The acoustic sources are described by the fourth-order space–time velocity cross correlations, which are calculated based on a large-eddy simulation flowfield. Gaussian functions are found to fit the axial, radial, and azimuthal cross correlations reasonably well. The axial length scales are three to four times the radial and azimuthal length scales. For the chevron jet, the cross-correlation scales vary with azimuthal angle up to six jet diameters downstream; beyond that, they become axisymmetric like those for a round jet. The fourth-order space–time cross correlation of the axial velocity R1111 is the dominant source component, and there are considerable contributions from other source components such as R2222, R3333, R1212, R1313, and R2323 cross correlations where 1, 2, and 3 represent axial, radial, and azimuthal directions, respectively. For the chevron jet, these cross correlations decay rapidly with axial distance whereas for the round jet, they remain roughly constant over the first 10 jet diameters. The chevron jet intensifies both the R2222 and R3333 cross correlations within two jet diameters of the jet exit. The amplitude, length, and time scales of the cross-correlations of a large-eddy simulation velocity field are investigated as functions of position and are found to be proportional to the turbulence amplitude, length, and time scales that are determined from a Reynolds-averaged Navier–Stokes calculation. The constants of proportionality are found to be independent of position within the jet, and they are quite close for chevron and round jets. The scales derived from Reynolds-averaged Navier–Stokes are used for source description, and an acoustic analogy is used for sound propagation. There is an excellent agreement between the far-field noise predictions and measurements. At low frequencies, the chevron nozzle significantly reduces the far-field noise by 5–6 dB at 30 deg and 2–3 dB at 90 deg to the jet axis. However, the chevron nozzle slightly increases high-frequency noise. It was found that R1212 and R1313 cross correlations have the largest contribution to the jet noise at 30 deg to the jet axis, whereas the R2323 cross correlation has the largest contribution to the jet noise at 90 deg to the jet axis. The Reynolds-averaged Navier–Stokes calculations are repeated with different turbulence models, and the noise prediction is found to be almost insensitive to the turbulence model. The results indicate that the modeling approach is capable of assessing advanced noise-reduction concepts.
N. K. Depuru Mohan; A. P. Dowling; S. A. Karabasov; Hao Xia; O. Graham; T. P. Hynes; P. G. Tucker. Acoustic Sources and Far-Field Noise of Chevron and Round Jets. AIAA Journal 2015, 53, 2421 -2436.
AMA StyleN. K. Depuru Mohan, A. P. Dowling, S. A. Karabasov, Hao Xia, O. Graham, T. P. Hynes, P. G. Tucker. Acoustic Sources and Far-Field Noise of Chevron and Round Jets. AIAA Journal. 2015; 53 (9):2421-2436.
Chicago/Turabian StyleN. K. Depuru Mohan; A. P. Dowling; S. A. Karabasov; Hao Xia; O. Graham; T. P. Hynes; P. G. Tucker. 2015. "Acoustic Sources and Far-Field Noise of Chevron and Round Jets." AIAA Journal 53, no. 9: 2421-2436.
NOTICE: this is the author’s version of a work that was accepted for publication in Computers & Fluids. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Computers & Fluids, in press DOI http://dx.doi.org/\ud 10.1016/j.compfluid.2014.09.035Turbulent jet large eddy simulations (LES) are performed at Mach 0.9 and Reynolds number around 106\ud .\ud Implicit large-eddy simulation (ILES) is employed, namely omitting explicit subgrid scale models. The\ud Reynolds-averaged Navier–Stokes (RANS) solution is blended into the near wall region. This makes an\ud overall hybrid LES-RANS approach. A Hamilton–Jacobi equation is applied to remove the disparate turbulence\ud length scales implied by hybridization. Computations are contrasted for a baseline axisymmetric\ud (round) nozzle and a serrated (or chevron) nozzle with high bending and penetration. Jet characteristics\ud for both nozzles are studied in detail with well documented experimental data compared. The chevron\ud effects are demonstrated by comparing both solutions using the same mesh resolution and flow conditions.\ud Higher order velocity moments with potential for aeroacoustic modeling and noise prediction, such\ud as the two-point velocity spatial correlations, are also explored. Numerical simulations presented in this\ud study utilize an in-house flow solver with improved parallel scalability and efficiency by means of data\ud packeting and a scheduling algorithm similar to the Round Robin scheduling
Hao Xia. Turbulent jet characteristics for axisymmetric and serrated nozzles. Computers & Fluids 2015, 110, 189 -197.
AMA StyleHao Xia. Turbulent jet characteristics for axisymmetric and serrated nozzles. Computers & Fluids. 2015; 110 ():189-197.
Chicago/Turabian StyleHao Xia. 2015. "Turbulent jet characteristics for axisymmetric and serrated nozzles." Computers & Fluids 110, no. : 189-197.
We report on a new class of all-conjugated polyelectrolyte diblock copoly(3-hexylthiophene)s, poly(3-hexylthiophene)-b-poly[3-[6-(N-methylimidazolium)hexyl]thiophene] (P3HT-b-P3MHT). The polyelectrolyte diblock copolymers were prepared by a catalyst-transfer Kumada polycondensation followed by quaternization of the bromohexyl side groups of the poly[3-(6-bromohexyl)thiophene] block with N-methylimidazole. The obtained diblock copolymers have well-defined block ratios, narrow polydispersity indices, and high regioregularity. Their characterization as well as the thermal, crystalline, and optical properties, and self-assembly behavior have been investigated in detail. Transmission electron microscopy (TEM) provided evidence for solvent-induced self-assembly. A series of morphologies including short or long nanowires and nanorings could be obtained depending on the selectivity of solvents toward different blocks and the block ratios.
Hao Xia; Zhi Ye; Xiaofeng Liu; Juan Peng; Feng Qiu. Synthesis, characterization, and solution structure of all-conjugated polyelectrolyte diblock copoly(3-hexylthiophene)s. RSC Advances 2014, 4, 19646 .
AMA StyleHao Xia, Zhi Ye, Xiaofeng Liu, Juan Peng, Feng Qiu. Synthesis, characterization, and solution structure of all-conjugated polyelectrolyte diblock copoly(3-hexylthiophene)s. RSC Advances. 2014; 4 (38):19646.
Chicago/Turabian StyleHao Xia; Zhi Ye; Xiaofeng Liu; Juan Peng; Feng Qiu. 2014. "Synthesis, characterization, and solution structure of all-conjugated polyelectrolyte diblock copoly(3-hexylthiophene)s." RSC Advances 4, no. 38: 19646.
Hao Xia. Numerical Study of Chevron Jet Noise Using Parallel Flow Solver. Procedia Engineering 2013, 61, 40 -47.
AMA StyleHao Xia. Numerical Study of Chevron Jet Noise Using Parallel Flow Solver. Procedia Engineering. 2013; 61 ():40-47.
Chicago/Turabian StyleHao Xia. 2013. "Numerical Study of Chevron Jet Noise Using Parallel Flow Solver." Procedia Engineering 61, no. : 40-47.
Hao Xia; P.G. Tucker; S. Eastwood; M. Mahak. The influence of geometry on jet plume development. Progress in Aerospace Sciences 2012, 52, 56 -66.
AMA StyleHao Xia, P.G. Tucker, S. Eastwood, M. Mahak. The influence of geometry on jet plume development. Progress in Aerospace Sciences. 2012; 52 ():56-66.
Chicago/Turabian StyleHao Xia; P.G. Tucker; S. Eastwood; M. Mahak. 2012. "The influence of geometry on jet plume development." Progress in Aerospace Sciences 52, no. : 56-66.
Nagendra Karthik Depuru Mohan; Sergey Karabasov; Owen Graham; Ann Dowling; Thomas Hynes; Paul Tucker; Hao Xia. Reduced-order Jet Noise Modelling for Chevrons. 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference) 2012, 1 .
AMA StyleNagendra Karthik Depuru Mohan, Sergey Karabasov, Owen Graham, Ann Dowling, Thomas Hynes, Paul Tucker, Hao Xia. Reduced-order Jet Noise Modelling for Chevrons. 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference). 2012; ():1.
Chicago/Turabian StyleNagendra Karthik Depuru Mohan; Sergey Karabasov; Owen Graham; Ann Dowling; Thomas Hynes; Paul Tucker; Hao Xia. 2012. "Reduced-order Jet Noise Modelling for Chevrons." 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference) , no. : 1.
Hao Xia; P.G. Tucker; G. Coughlin. Novel applications of BEM based Poisson level set approach. Engineering Analysis with Boundary Elements 2012, 36, 907 -912.
AMA StyleHao Xia, P.G. Tucker, G. Coughlin. Novel applications of BEM based Poisson level set approach. Engineering Analysis with Boundary Elements. 2012; 36 (5):907-912.
Chicago/Turabian StyleHao Xia; P.G. Tucker; G. Coughlin. 2012. "Novel applications of BEM based Poisson level set approach." Engineering Analysis with Boundary Elements 36, no. 5: 907-912.
Simon Eastwood; Hao Xia; Paul G. Tucker. Large-Eddy Simulation of Complex Geometry Jets. Journal of Propulsion and Power 2012, 28, 235 -245.
AMA StyleSimon Eastwood, Hao Xia, Paul G. Tucker. Large-Eddy Simulation of Complex Geometry Jets. Journal of Propulsion and Power. 2012; 28 (2):235-245.
Chicago/Turabian StyleSimon Eastwood; Hao Xia; Paul G. Tucker. 2012. "Large-Eddy Simulation of Complex Geometry Jets." Journal of Propulsion and Power 28, no. 2: 235-245.