Numerical study of tip vortex cavitation using CFD method

被引：0
|
作者：
Han B. [1 ]
Xiong Y. [1 ]
Liu Z. [1 ]
机构：
[1] College of Naval Architecture and Power, Naval University of Engineering
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2011年 / 32卷 / 06期
关键词：
Desinence cavitation number; Modified VOF cavitation model; Rotation-curvature correction; Tip vortex cavitation; Turbulence model;
D O I：
10.3969/j.issn.1006-7043.2011.06.002
中图分类号：
学科分类号：
摘要：
The numerical simulation of tip vortex cavitation is significant in the process to alleviate the effects of the cavitation. The characteristics of tip vortex cavitation behind an elliptic foil were studied using Reynolds-averaged Navier-Stokes (RANS) equations with a modified VOF (volume fraction) cavitation model. The turbulence model selected was an explicit algebraic Reynolds stress model. In order to reduce the discrete error induced by the grid, mesh refinement was applied to the area of the tip vortex core in numerical simulation. First, the axis and tangential velocity of the tip vortex flow field with no cavitation were calculated. To consider the effect of system rotation and streamline curvature, the rotation-curvature correction was adapted to the turbulence model and it was found the turbulence model after correction increased the prediction precision. Numerical results show that the corrected eddy viscosity turbulence models agreed well with the experiment, while the unmodified versions over-predicted the turbulence-induced diffusion. Based on that, the desinence cavitation number of tip vortex cavitation was predicted using the RANS method and modified VOF cavitation model, and the numerical result shows good agreement with experimental result.
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页码：702 / 707
页数：5
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