Numerical method for viscous cavitating flow around ship propeller

被引：5
|
作者：
Zhu Z. [1 ,2 ]
Fang S. [1 ]
Wang X. [1 ]
机构：
[1] Key Laboratory of Underwater Acoustic Signal Processing of Ministry of Education, Southeast University
[2] School of Electrical Engineering and Information, Anhui University of Technology
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2010年 / 40卷 / 06期
关键词：
Cavitation; Navier-Stocks equations; Numerical simulation; Propeller; Turbulence;
D O I：
10.3969/j.issn.1001-0505.2010.06.004
中图分类号：
学科分类号：
摘要：
The numerical method for viscous cavitating flow field was studied with propeller E779a. Based on viscous multiphase flow theory, Navier-Stokes (N-S) and Bubble Dynamics equations were solved to predict propeller thrust coefficient KT, axial velocity UX and vapor volume fraction av in an uniform inflow. The numerical results indicate that the accuracy of the predictions of KT and UX is improved by 3% with increasing the distance from propeller disk to pressure outlet in computational domain. A sheet cavitation is better predicted with the structured grid in outer domain with regular shape of column. For the same grid strategy, the size of grid cells decreased within certain limits has little influence on the prediction of position of the sheet cavitation, KT and UX, but enhances the accuracy of the prediction of the sheet cavitation degree by 23%. The grid convergence index demonstrates good grid dependence. The standard k-ω turbulence model makes calculation more convergent. The LES(large eddg simulation) improves the accuracy of the prediction of UX and turbulence kinetic energy.
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页码：1146 / 1151
页数：5
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