空化器参数对超空泡初生位置影响大涡模拟

为揭示空化器参数对超空泡初生位置的影响规律,离散求解了三维气液两相大涡模拟控制方程组,对三维不同空化器参数模型下超空泡流动进行了数值模拟。在不同空化数条件下,通过数值模拟获得超空泡无量纲几何参数并与实验数据对比,结果表明两者吻合良好。在此基础上,分析了不同空化器形状、直径对超空泡初生位置影响。分析结果为探索高速航行体空化器性能与水动力特性提供了数值参考。

Large Eddy Simulation Analysis on Effect of Cavitator Parameter on Supercavity Primary Position

In order to reveal the effect of cavitator parameter on the primary position of supercavity,the three-dimension gas-liquid LES ( large eddy simulation ) Navier-Stokes equations were discreted and solved. The numerical simulation of three-dimension supercavitating phenomenon flow around navigation bodies with different cavitator-parameters were carried out. The dimensionless geometric parameters of su-percavity under the conditions of different cavitation numbers were obtained. The calculation result was compared with experimental result. The numerical result agrees well with the experimental result. On this basis,the supercavitating flows around navigation body which has been calculated at different cavitator di-ameters and cavitator-shapes. The effects of different cavitator-shapes and diameters on supercavity promary position were analyzed. The analysis result offers academic reference for the study of hydrodynamics and cavitator performance of high-speed bodies.