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Dr. Zhiqun Guo
Harbin Engineering University

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Research Keywords & Expertise

0 Hydrodynamics
0 Wave energy converter
0 Wind Energy Harvesting
0 Seakeeping performance of ship and floating platform
0 Surface effect ship

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Hydrodynamics
Seakeeping performance of ship and floating platform
Surface effect ship

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Journal article
Published: 29 August 2020 in Ocean Engineering
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One of typical bases for floating offshore wind turbines is the barge platform that has merits of simpler structure and lower costs, but disadvantages of significant responses in waves. In order to improve the hydrodynamic performance of the barge platforms, in this paper a novel Air cushion Barge Platform (ACBP) is proposed, into which multiple air chambers are incorporated to mitigate the wave loads and reduce the dynamic motions due to waves. However, the existing analytical method is not suitable for evaluating the righting moment and stability of the ACBP at large angles. To address this issue, a new analytical method is developed, which can be used to quickly calculate its righting moment and evaluate its stability in the whole range of trim angles, including very large one with possible emergence of the platform bottom and so with air leakage from a few chambers before capsized. The newly proposed analytical method is calibrated by the CFD results, and then is employed for investigating the static and dynamic stability of the ACBP for two typical designs.

ACS Style

HongBin Hao; Zhiqun Guo; Qingwei Ma; Guochun Xu. Air cushion barge platform for offshore wind turbine and its stability at a large range of angle. Ocean Engineering 2020, 217, 107886 .

AMA Style

HongBin Hao, Zhiqun Guo, Qingwei Ma, Guochun Xu. Air cushion barge platform for offshore wind turbine and its stability at a large range of angle. Ocean Engineering. 2020; 217 ():107886.

Chicago/Turabian Style

HongBin Hao; Zhiqun Guo; Qingwei Ma; Guochun Xu. 2020. "Air cushion barge platform for offshore wind turbine and its stability at a large range of angle." Ocean Engineering 217, no. : 107886.

Journal article
Published: 27 August 2020 in Journal of Marine Science and Engineering
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Thebarge platform has the advantages of low cost, simple structure, and reliable hydrodynamic performance. In order to further improve the hydrodynamics of the barge platform and to reduce its motion response in waves, a zero-pressurized air cushion is incorporated into the platform in this paper. The pressure of the zero-pressurized air cushion is equal to atmospheric pressure and thus does not provide buoyancy to the platform. As compared to the conventional pressurized air cushion, the zero-pressurized one has advantages of less air leakage risk. However, due to the coupling effect on the interface between water and air cushion, the influence of the gas inside the air cushion on the performance of the floating body has become a difficult problem. Based on the boundary element method, the motion response of the zero-pressurized air-cushion-assisted barge platform under regular and irregular waves is calculated and analyzed in the paper. Compared with the barge platform without air cushion, numerical results from the theoretical method show that in regular waves,the air cushion could significantly reduce the amplitude of heave and pitch (roll) response of the round barge platform in the vicinity of resonance. In irregular waves, the air cushion also observably reduces the pitch (roll) motion, though amplifies the heave motion due to the transfer of heave resonance frequency. Thetheoretical study demonstrates that the zero-pressurized air cushion can reduce the seakeeping motion of barge platforms in high sea states, but might also bring negative effects to heave motion in low sea states.One should carefully design the air cushion for barge platforms according to the operating sea states to achieve satisfactory hydrodynamic performance in engineering application.

ACS Style

Fengmei Jing; Li Xu; Zhiqun Guo; Hengxu Liu. A TheoreticalStudy on the Hydrodynamics of a Zero-Pressurized Air-Cushion-Assisted Barge Platform. Journal of Marine Science and Engineering 2020, 8, 664 .

AMA Style

Fengmei Jing, Li Xu, Zhiqun Guo, Hengxu Liu. A TheoreticalStudy on the Hydrodynamics of a Zero-Pressurized Air-Cushion-Assisted Barge Platform. Journal of Marine Science and Engineering. 2020; 8 (9):664.

Chicago/Turabian Style

Fengmei Jing; Li Xu; Zhiqun Guo; Hengxu Liu. 2020. "A TheoreticalStudy on the Hydrodynamics of a Zero-Pressurized Air-Cushion-Assisted Barge Platform." Journal of Marine Science and Engineering 8, no. 9: 664.

Journal article
Published: 17 May 2019 in Water
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The Partial Air Cushion Supported Catamaran (PACSCAT) is an innovative design which combines both the characteristics of hovercraft and catamaran. Further, it provides a high-speed and efficient solution with excellent performance, particularly for shallow water. In this paper, experimental and numerical method are carried out for research of motion attitude and resistance characteristics, which provide a reference for further research and hull optimization work. By model towing test and data interpretation, and the resistance, trim, and heave varying law with increasing speed is summarized. From the view of total resistance, the impacts of the cushion pressure and air flow on resistance performance of PACSCAT are analyzed. Based on the theory of viscous fluid mechanics, a numerical simulation method with high prediction accuracy is established. The flow field around and inside the hull is simulated, the simulating results show good agreements with the testing data. Finally, the effect of the cushion compartment improving the resistance performance is studied. The results show that the cushion compartment is significant for adjusting the pressure distribution of the air cushion. And the average resistance reduction ratio at the high-speed segment can even reach 22%.

ACS Style

Shijie Lu; Jin Zou; Yuangang Zhang; Zhiqun Guo. Experimental and Numerical Study on Motion and Resistance Characteristics of the Partial Air Cushion Supported Catamaran. Water 2019, 11, 1033 .

AMA Style

Shijie Lu, Jin Zou, Yuangang Zhang, Zhiqun Guo. Experimental and Numerical Study on Motion and Resistance Characteristics of the Partial Air Cushion Supported Catamaran. Water. 2019; 11 (5):1033.

Chicago/Turabian Style

Shijie Lu; Jin Zou; Yuangang Zhang; Zhiqun Guo. 2019. "Experimental and Numerical Study on Motion and Resistance Characteristics of the Partial Air Cushion Supported Catamaran." Water 11, no. 5: 1033.

Journal article
Published: 23 October 2018 in Water
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When operated under large water immersion, surface piercing propellers are prone to be in heavy load conditions. To improve the hydrodynamic performance of the surface piercing propellers, engineers usually artificially ventilate the blades by equipping a vent pipe in front of the propeller disc. In this paper, the influence of artificial ventilation on the hydrodynamic performance of surface piercing propellers under full immersion conditions was investigated using the Computational Fluid Dynamics (CFD) method. The numerical results suggest that the effect of artificial ventilation on the pressure distribution on the blades decreases along the radial direction. And at low advancing speed, the thrust, torque as well as the efficiency of the propeller are smaller than those without ventilation. However, with the increase of the advancing speed, the efficiency of the propeller rapidly increases and can be greater than the without-ventilation case. The numerical results demonstrates the effectiveness of the artificial ventilation approach for improving the hydrodynamic performance of the surface piercing propellers for high speed planning crafts.

ACS Style

Dongmei Yang; Zhen Ren; Zhiqun Guo; Zeyang Gao. Numerical Analysis on the Hydrodynamic Performance of an Artificially Ventilated Surface-Piercing Propeller. Water 2018, 10, 1499 .

AMA Style

Dongmei Yang, Zhen Ren, Zhiqun Guo, Zeyang Gao. Numerical Analysis on the Hydrodynamic Performance of an Artificially Ventilated Surface-Piercing Propeller. Water. 2018; 10 (11):1499.

Chicago/Turabian Style

Dongmei Yang; Zhen Ren; Zhiqun Guo; Zeyang Gao. 2018. "Numerical Analysis on the Hydrodynamic Performance of an Artificially Ventilated Surface-Piercing Propeller." Water 10, no. 11: 1499.

Journal article
Published: 01 September 2018 in Applied Ocean Research
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ACS Style

Zhiqun Guo; Q.W. Ma; Hongde Qin. A novel 2.5D method for solving the mixed boundary value problem of a surface effect ship. Applied Ocean Research 2018, 78, 25 -32.

AMA Style

Zhiqun Guo, Q.W. Ma, Hongde Qin. A novel 2.5D method for solving the mixed boundary value problem of a surface effect ship. Applied Ocean Research. 2018; 78 ():25-32.

Chicago/Turabian Style

Zhiqun Guo; Q.W. Ma; Hongde Qin. 2018. "A novel 2.5D method for solving the mixed boundary value problem of a surface effect ship." Applied Ocean Research 78, no. : 25-32.

Journal article
Published: 14 August 2018 in European Journal of Mechanics - B/Fluids
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This paper presents an approximate but efficient method for modeling the hydrodynamics and seakeeping performance of partial air cushion supported catamaran (PACSCAT) with planing demihulls. This method takes into account of the effects of the waves on the air–water interface under the air cushion induced by the pulsating pressure in the cushion and by the demihulls, which are ignored by existing approximate methods. Specifically, the new developments are made in two aspects. One is that the governing equations of the heave and pitch motions of the PACSCAT are derived to include the effects of the waves under the air cushion due to the pulsating pressure and the demihulls. Another one is that an approximate method is developed for evaluating the waves due to the pulsating pressure. Better agreement between the experimental data and the numerical results for pressure is achieved.

ACS Style

Zhiqun Guo; Hongde Qin; Q.W. Ma. A study on hydrodynamics of the air cushion of a high-speed PACSCAT. European Journal of Mechanics - B/Fluids 2018, 72, 353 -363.

AMA Style

Zhiqun Guo, Hongde Qin, Q.W. Ma. A study on hydrodynamics of the air cushion of a high-speed PACSCAT. European Journal of Mechanics - B/Fluids. 2018; 72 ():353-363.

Chicago/Turabian Style

Zhiqun Guo; Hongde Qin; Q.W. Ma. 2018. "A study on hydrodynamics of the air cushion of a high-speed PACSCAT." European Journal of Mechanics - B/Fluids 72, no. : 353-363.

Journal article
Published: 20 April 2018 in Water
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The transmission of water waves under vertical thin plates, e.g., offshore floating breakwaters, oscillating water column wave energy converters, and so on, is a crucial feature that dominates the hydrodynamic performance of marine devices. In this paper, the analytical solution to the transmission of water waves under multiple 2D vertical thin plates is firstly derived based on the linear potential theory. The influences of relevant parameters on the wave transmission are discussed, which include the number of plates, the draft of plates, the distance between plates and the water depth. The analytical results suggest that the transmission of progressive waves gradually weakens with the growth of the number and draft of plates, and under the conditions of given number and draft of plates, the distribution of plates has significant influence on the transmission of progressive waves. The results of this paper contribute to the understanding of the transmission of water waves under multiple vertical thin plates, as well as the suggestion on optimal design of complex marine devices, such as a floating breakwater with multiple plates.

ACS Style

Yifei Yu; Zhiqun Guo; Qingwei Ma. Transmission of Water Waves under Multiple Vertical Thin Plates. Water 2018, 10, 517 .

AMA Style

Yifei Yu, Zhiqun Guo, Qingwei Ma. Transmission of Water Waves under Multiple Vertical Thin Plates. Water. 2018; 10 (4):517.

Chicago/Turabian Style

Yifei Yu; Zhiqun Guo; Qingwei Ma. 2018. "Transmission of Water Waves under Multiple Vertical Thin Plates." Water 10, no. 4: 517.

Journal article
Published: 28 March 2018 in Applied Sciences
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A novel time-domain body-nonlinear Green’s function method is developed for evaluating large-amplitude roll damping of two-dimensional floating bodies with consideration of viscous dissipation effects. In the method, the instantaneous wetted surface of floating bodies is accurately considered, and the viscous dissipation effects are taken into account based on the “fairly perfect fluid” model. As compared to the method based on the existing inviscid body-nonlinear Green’s function, the newly proposed method can give a more accurate damping coefficient of floating bodies rolling on the free surface with large amplitudes according to the numerical tests and comparison with experimental data for a few cases related to ship hull sections with bilge keels.

ACS Style

Zhiqun Guo; Qingwei Ma; Shuangrui Yu; Hongde Qin. A Body-Nonlinear Green’s Function Method with Viscous Dissipation Effects for Large-Amplitude Roll of Floating Bodies. Applied Sciences 2018, 8, 517 .

AMA Style

Zhiqun Guo, Qingwei Ma, Shuangrui Yu, Hongde Qin. A Body-Nonlinear Green’s Function Method with Viscous Dissipation Effects for Large-Amplitude Roll of Floating Bodies. Applied Sciences. 2018; 8 (4):517.

Chicago/Turabian Style

Zhiqun Guo; Qingwei Ma; Shuangrui Yu; Hongde Qin. 2018. "A Body-Nonlinear Green’s Function Method with Viscous Dissipation Effects for Large-Amplitude Roll of Floating Bodies." Applied Sciences 8, no. 4: 517.

Journal article
Published: 24 February 2018 in Water
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The mean water surface (interface) under the air cushion of a surface effect ship (SES) or an air cushion supported platform (ACSP) is generally lower than the outside water surface due to the overpressure of the air cushion. To precisely analyze the hydrodynamics under the air cushion, multiple water levels should be considered in numerical models. However, when using free surface Green’s functions as numerical methods, the water level difference cannot be taken into account, because free surface Green’s functions normally require users to set in the whole water domain a unique datum water surface that completely separates the air domain and the water domain. To overcome this difficulty, a multi-domain approach is incorporated into a 2.5D method that is based on a time domain free surface Green’s function with viscous dissipation effects in this paper. In the novel multi-domain 2.5D method, the water domain is partitioned into inner and outer domains, and the interface is located in the inner domain while the outside water surface is placed in the outer domain. In each domain there exists only one unique water level, while water levels in different domains are allowed to be different. Benefited from this characteristic, the multi-domain 2.5D method is able to precisely consider the water level difference and its influence on hydrodynamics. The newly proposed multi-domain 2.5D method is employed to predict the hydrodynamics of an SES, and it is confirmed that the multi-domain 2.5D method can give better numerical results than the single-domain one for the given case.

ACS Style

Zhiqun Guo; Qingwei Ma; Hongde Qin. Multi-Domain 2.5D Method for Multiple Water Level Hydrodynamics. Water 2018, 10, 232 .

AMA Style

Zhiqun Guo, Qingwei Ma, Hongde Qin. Multi-Domain 2.5D Method for Multiple Water Level Hydrodynamics. Water. 2018; 10 (2):232.

Chicago/Turabian Style

Zhiqun Guo; Qingwei Ma; Hongde Qin. 2018. "Multi-Domain 2.5D Method for Multiple Water Level Hydrodynamics." Water 10, no. 2: 232.

Journal article
Published: 15 January 2018 in Water
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A novel time-domain Green’s function is developed for dealing with two-dimensional interaction between water waves and floating bodies with considering viscous dissipation effects based on the “fairly perfect fluid” model. In the Green’s function, the temporal (lower order viscosity coefficient term) and spatial (higher order viscosity coefficient term) viscous dissipation effects are fully considered. As compared to the methods based on the existing time-domain Green’s functions that could not account for the spatial viscous dissipation, the method based on the new time-domain Green’s function can give much better numerical results and overcome instability problems related to the existing Green’s function, according to the numerical tests and comparison with CFD modeling data for a few cases related to floating bodies with a flare angle.

ACS Style

Zhiqun Guo; Q. W. Ma; Hongde Qin. A Time-Domain Green’s Function for Interaction between Water Waves and Floating Bodies with Viscous Dissipation Effects. Water 2018, 10, 72 .

AMA Style

Zhiqun Guo, Q. W. Ma, Hongde Qin. A Time-Domain Green’s Function for Interaction between Water Waves and Floating Bodies with Viscous Dissipation Effects. Water. 2018; 10 (1):72.

Chicago/Turabian Style

Zhiqun Guo; Q. W. Ma; Hongde Qin. 2018. "A Time-Domain Green’s Function for Interaction between Water Waves and Floating Bodies with Viscous Dissipation Effects." Water 10, no. 1: 72.

Journal article
Published: 01 March 2016 in International Journal of Offshore and Polar Engineering
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ACS Style

Zhiqun Guo; Qingwei Ma; Xiaofeng Hu. Seakeeping Analysis of a Wave-Piercing Catamaran Using URANS-Based Method. International Journal of Offshore and Polar Engineering 2016, 26, 1 .

AMA Style

Zhiqun Guo, Qingwei Ma, Xiaofeng Hu. Seakeeping Analysis of a Wave-Piercing Catamaran Using URANS-Based Method. International Journal of Offshore and Polar Engineering. 2016; 26 (1):1.

Chicago/Turabian Style

Zhiqun Guo; Qingwei Ma; Xiaofeng Hu. 2016. "Seakeeping Analysis of a Wave-Piercing Catamaran Using URANS-Based Method." International Journal of Offshore and Polar Engineering 26, no. 1: 1.

Journal article
Published: 01 December 2015 in Ocean Engineering
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The partial air cushion supported catamaran (PACSCAT) is a type of air cushion assisted catamaran with planing demihulls. Both the air cushion and the demihulls can strongly affect the seakeeping performance. Although there exist some methods for analyzing the seakeeping of other air cushion supported vessels considering the effects of both the air cushion and demihulls, they can take considerable computational time. In this paper, an efficient numerical method is presented, which is formed by combining the 2.5D theory for solving hydrodynamics of demihulls with simplified wave-equation for solving aerodynamics of pressurized air to analysis the seakeeping performance of the high-speed PACSCAT. In the method, the cushion pressure is determined by using adiabatic gas law together with boundary conditions including the craft motion, free surface elevation, fan flows and air leakage. Two models are proposed for air leakage: constant leakage area and varying leakage area linearly related to ship motions and free surface elevation. The results obtained by the newly formulated method are compared with the experimental data, showing that the numerical results have reasonable agreements with experimental ones.

ACS Style

Z.Q. Guo; Q.W. Ma; J.L. Yang. A seakeeping analysis method for a high-speed partial air cushion supported catamaran (PACSCAT). Ocean Engineering 2015, 110, 357 -376.

AMA Style

Z.Q. Guo, Q.W. Ma, J.L. Yang. A seakeeping analysis method for a high-speed partial air cushion supported catamaran (PACSCAT). Ocean Engineering. 2015; 110 ():357-376.

Chicago/Turabian Style

Z.Q. Guo; Q.W. Ma; J.L. Yang. 2015. "A seakeeping analysis method for a high-speed partial air cushion supported catamaran (PACSCAT)." Ocean Engineering 110, no. : 357-376.