低弗鲁德数条件下通气超空泡泄气机理数值模拟  

NUMERICAL SIMULATION OF GAS LEAKAGE MECHANISM OF VENTILATED SUPERCAVITY UNDER THE CONDITION OF LOW FROUDE NUMBER

作　　者：周景军[1] 于开平[1] 杨明[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《工程力学》2011年第1期251-256,共6页Engineering Mechanics

基　　金：国家自然科学基金重点项目(10832007)

摘　　要：基于RANS方程,采用分相流模型对超空泡在低弗鲁德数条件下的泄气机理进行了模拟,考虑了水-气两相之间的相互作用及重力效应。研究了不同湍流模型对泄气率的影响。得出了不同弗鲁德数和不同通气率条件下超空泡的泄气规律,与水洞试验现象一致。计算结果与经典经验公式对比表明数值方法具有很好的计算精度,对进一步研究通气超空泡的物理机制具有重要意义。Based on RANS equations,the gas leakage mechanism of ventilated supercavity has been simulated using a inhomogeneous model with the consideration of gas-water interactions under the condition of low Froude number.The influence of different turbulence models to gas leakage coefficients has been investigated.The gas leakage rule of supercavity has been achieved at different Froude numbers and ventilation coefficients,the results accord well with that of water-tunnel test phenomena.The numerical method has a good calculation precision by comparing the results with that of classical empirical formulae and has important significance to further investigate the physical mechanism of ventilated supercavity.

关 键 词：流体力学 超空泡 数值模拟 泄气率 双涡管 

分 类 号：O351.2[理学—流体力学] TV131.32[理学—力学]