| 粘流方法的螺旋桨尾流场数值分析(英文) |
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| 引用本文： | 何苗,王超,常欣,黄胜.粘流方法的螺旋桨尾流场数值分析(英文)[J].船舶与海洋工程学报,2012,11(3):295-300. |
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| 作者姓名： | 何苗 王超 常欣 黄胜 |
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| 作者单位： | College of Shipbuilding Engineering,Harbin Engineering University |
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| 基金项目： | Supported by Fundamental Research Funds for the Central Universities(Grant No.HEUCFT1001);Ph.D Programs Foundation of Ministry of Education of China(Grant No.10702016) |
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| 摘 要： | The computational fluid dynamics(CFD) method is used to numerically simulate a propeller wake flow field in open water.A sub-domain hybrid mesh method was adopted in this paper.The computation domain was separated into two sub-domains,in which tetrahedral elements were used in the inner domain to match the complicated geometry of the propeller,while hexahedral elements were used in the outer domain.The mesh was locally refined on the propeller surface and near the wake flow field,and a size function was used to control the growth rate of the grid.Sections at different axial location were used to study the spatial evolution of the propeller wake in the region ranging from the disc to one propeller diameter(D) downstream.The numerical results show that the axial velocity fluctuates along the wake flow;radial velocity,which is closely related to vortices,attenuates strongly.The trailing vortices interact with the tip vortex at the blades’ trailing edge and then separate.The strength of the vortex shrinks rapidly,and the radius decreases 20% at one diameter downstream.
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| 关 键 词： | computational fluid dynamics(CFD) viscous fluid mechanics sub-domain hybrid mesh wake velocity field |
Analysis of a propeller wake flow field using viscous fluid mechanics |
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| Miao He,Chao Wang,Xin Chang,Sheng Huang.Analysis of a propeller wake flow field using viscous fluid mechanics[J].Journal of Marine Science and Application,2012,11(3):295-300. |
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| Authors: | Miao He Chao Wang Xin Chang Sheng Huang |
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| Institution: | College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China |
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| Abstract: | The computational fluid dynamics(CFD) method is used to numerically simulate a propeller wake flow field in open water.A sub-domain hybrid mesh method was adopted in this paper.The computation domain was separated into two sub-domains,in which tetrahedral elements were used in the inner domain to match the complicated geometry of the propeller,while hexahedral elements were used in the outer domain.The mesh was locally refined on the propeller surface and near the wake flow field,and a size function was used to control the growth rate of the grid.Sections at different axial location were used to study the spatial evolution of the propeller wake in the region ranging from the disc to one propeller diameter(D) downstream.The numerical results show that the axial velocity fluctuates along the wake flow;radial velocity,which is closely related to vortices,attenuates strongly.The trailing vortices interact with the tip vortex at the blades’ trailing edge and then separate.The strength of the vortex shrinks rapidly,and the radius decreases 20% at one diameter downstream. |
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| Keywords: | computational fluid dynamics(CFD) viscous fluid mechanics sub-domain hybrid mesh wake velocity field |
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