通气空泡最小空化数影响因素数值研究  

Numerical research on influencing factors of ventilated cavity minimum cavitation number

作　　者：张广[1] 于开平[1] 邹望[1] 李振旺[1] 

机构地区：[1]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2013年第5期13-17,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金重点资助项目(10832007)

摘　　要：为了揭示重力效应及水洞阻塞效应对最小通气空化数的影响,本文基于两流体多相流模型和SST(Shear Stress Transport)湍流模型,考虑了水气两相间的相互作用,建立了通气空泡流三维数值仿真模型.对比研究了无界流场和水洞流场中最小通气空化数与其影响因素之间的关系.研究结果表明无界流场中的最小通气空化数随弗劳德数的增加而减小,两者呈幂函数关系;在水洞中,相同的弗劳德数条件下最小空化数随着阻塞比的增加而增加.在相同的弗劳德数区间内,最小空化数的变化幅度随阻塞比的增加而减小.In order to reveal the influence of gravity effect and tunnel blocking effect on the minimum ventilation cavitation number.In this paper,based on the two-fluid multiphase flow and SST(Shear Stress Transport) turbulence models considering gas-water interaction,the three-dimensional ventilated cavity simulation model is established.The relations between minimum ventilation cavitation number and its influencing factors are analyzed respectively in unbounded flow field and water tunnel.The simulations show that minimum cavitation number decreases with the increase of Froude number in unbounded flow field in the form of a power function.In water tunnel the minimum cavitation number increases with the blockage ratio at the same Froude number.The change range of minimum cavitation number decreases with the increase of the blockage ratio at the same Froude number range.

关 键 词：通气空泡 最小空化数 重力效应 阻塞比 

分 类 号：O351.2[理学—流体力学]