Large eddy simulation of tip leakage cavitating flow focusing on cavitation-vortex interaction with Cartesian cut-cell mesh method

被引：1

作者：

白晓蕊 ^{[1
,2
,3
]}

程怀玉 ^{[1
,2
]}

季斌 ^{[1
,3
]}

龙新平 ^{[1
,2
]}

机构：

[1] State Key Lab of Water Resources and Hydropower Engineering Science, School of Power and Mechanical Engineering, Wuhan University

[2] Hubei Key Laboratory of Waterjet Theory and New Technology, Wuhan University

[3] Science and Technology on Water Jet Propulsion Laboratory

来源：

Journal of Hydrodynamics | 2018年 / 30卷 / 04期

关键词：

Cavitation; tip-leakage vortex; large eddy simulation(LES); Cartesian cut-cell mesh; vortex dynamics;

D O I：

暂无

中图分类号：

O35 [流体力学];

学科分类号：

080103 ; 080704 ;

摘要：

In the present paper, flow configurations of cavitating flow around a straight NACA0009 foil with a gap between the foil tip and sidewall are investigated numerically by large eddy simulation(LES) coupled with Zwart-Gerber-Belamri(ZGB) cavitation model. A Cartesian cut-cell method is used for mesh generation, which is of good orthogonality and high quality. A good agreement is obtained between simulation and experiment. Two influencing factors on vorticity distributions, the interaction between different vortices and the occurrence of cavitation, are discussed in detail based on the numerical results. A series of ?-shaped loops are observed during the development of the induced vortex, which is a result of the instability of vortex pair. This finding may provide a new viewpoint to control the evolution of tip-leakage vortex(TLV) cavitation. Moreover, it is found that the dilatation term plays a much more important role in the evolution of TLV cavitation compared with that in sheet cavitation.

引用

页码：750 / 753

页数：4

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