圆柱型后体对圆锥垂直入水空泡的影响  

Numerical simulation of influence of cylinder afterbody on cone vertical water-entry cavity

作　　者：黄海龙[1,2] 王柏秋[3] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090 [2]北京宇航系统工程研究所,北京100076 [3]哈尔滨工业大学建筑学院,哈尔滨150001

出　　处：《哈尔滨商业大学学报（自然科学版）》2014年第5期583-588,共6页Journal of Harbin University of Commerce：Natural Sciences Edition

摘　　要：基于VOF(Volume of Fluid)方法和有限体积法求解气、水两相流动的RANS方程,并结合动网格技术,对带圆柱后体的圆锥垂直入水空泡进行了数值研究.将球体垂直入水早期空泡形态的数值计算结果与A·May的理想空泡模型拟合结果进行对比分析,二者具有较好的一致性,验证了数值计算方法的有效性.在此基础之上,进一步研究了带圆柱后体的模型垂直入水空泡生成过程,分析了有、无圆柱后体和不同后体长度对匀速垂直入水空泡的影响.给出了不同长度后体匀速垂直入水空泡内部流场的分布,以及后体对匀速垂直入水空泡闭合和空泡最大直径等的影响和表面闭合时间的影响规律.The numerical simulation is based on the Reynolds -Averaged-Navier-Stokes （ RANS） equations.The Finite-Volume Method is used in the discretization of the control equations , and Volume of Fluid Method is adopted for the multiphase flows of water -entry cavity .The dynamic mesh method is used to control the constant speed of the cylinder .The effects of with or without cylinder afterbody and various length afterbody on the vertical water-entry cavity was numerically investigated .The calculation results of the cavity shape of water entry of the sphere were directly compared with the “ideal cavity” of A· May, which showed that the computation methodology properly captures the key features of constant speed vertical water entry cavity .The results of various length afterbodies showed that the cavity af-ter cone with afterbody had different dynamics feature different and different spatial distribu-ting of phase .

关 键 词：垂直入水 VOF 入水空泡 圆柱后体 

分 类 号：TV131.2[水利工程—水力学及河流动力学]