水下火箭弹头部空化流场的数值仿真研究  

Numerical simulation on the cavitation fluid field of an underwater rocket warhead

作　　者：陈勇[1] 张合[1] 马少杰[1] 刘茂生 

机构地区：[1]南京理工大学智能弹药技术国防重点学科实验室,江苏南京210094 [2]康普通讯技术有限公司,江苏苏州215021

出　　处：《哈尔滨工程大学学报》2015年第1期29-33,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51275248);"十二五"兵器支撑计划资助项目(62201040603);江苏省普通高校研究生科研创新计划基金资助项目(CXZZ13_0190)

摘　　要：对火箭弹头部的局部空化流场的研究可作为头部敏感装置安装位置设计和选择的依据。研究了利用RANS(针对定常分析)和LES(针对非定常分析)湍流模型对水下火箭弹弹体头部空化流场进行仿真分析的方法,并与实验结果进行对比验证。通过仿真分析了在零攻角/小攻角下弹体头部周围定常、非定常流场空化区域和不同速度、加速度下空化区的变化;比较了相同空化数下不同速度对空化区域的影响。结果发现,小攻角情况下的火箭弹头部背流面空化流场存在较强的非定常特性,头部流场空化区受到加速度的影响且存在速度比尺效应。Sensitive devices mounted on the rocket warhead can be designed and chosen based on the studies of partial cavitation flow field around it. This paper studied the method of simulation analysis on the cavitation flow field of an underwater rocket war head by using the RANS（ steady） and LES（ unsteady） turbulence model. The simulation result was compared and validated with experimental results. The steady / unsteady cavitation flow fields around the warhead were analyzed in zero attack angle / small attack angle situation by simulation and the cavitation zone changes at different speeds or accelerations were also analyzed. The influence of different speeds on the cavitation zone was compared at the same cavitation number. The results showed that there is a strong unsteady characteristic in the back cavitation field flow of the rocket warhead at small attack angle,and the head flow cavitation zone is affected by the acceleration and a velocity scale effect exists.

关 键 词：水中弹药 流体仿真 攻角 空化 速度比尺效应 瞬态流场 湍流模型 

分 类 号：TJ43[兵器科学与技术—火炮、自动武器与弹药工程]