轴对称物体空化绕流的数值研究  

Numerical Simulation of Cavitating Flows over Axisymmetric Objects

作　　者：刘乾坤[1] 郜冶[1] 陈宇翔[1] 

机构地区：[1]哈尔滨工程大学航天与建筑工程学院,黑龙江哈尔滨150001

出　　处：《计算机仿真》2012年第10期405-408,422,共5页Computer Simulation

基　　金：国家自然科学基金资助项目(10972063)

摘　　要：空化绕流是水中普遍存在的现象,会对物体周围流场造成很大阻力,进而改变物体的水动力特性,必须加以优化研究。为此提出用多相流混合模型并耦合自然空化模型,对圆盘空化器的超空泡流和典型回转体的部分空泡流进行了数值仿真,并与边界元方法、分析解和实验数据进行了对比分析,利用软件FLUENT6.2进行仿真,结果表明,所建立的空化流计算模型是可行的,可为相关水动力研究提供参考和依据。Cavitaing flow around the objects is a general phenomenon in water.The flow fields are greatly affected by the cavitating flows,which results in hydrodynamic characteristics of the objects to be changed.Combined with multiphase mixture model and natural cavitaion model,the supercavitating flows over a disk cavitator and the partial cavitating flows over typical spinning objects were studied using FLUENT 6.2.Furthermore,the present results of comparison boundary element method（BEM）,the analytical relations and available experimental results were discussed.The results show that the shortcomings of the BEM in the literature are evident to the pressure prediction in the cavity tail closure region,and a computing model on cavitating flows was validated,offering the references and bases for hydrodynamic researches.

关 键 词：轴对称体 空化绕流 多相流混合模型 数值仿真 

分 类 号：TJ762.4[兵器科学与技术—武器系统与运用工程]