跨声速下子母弹囊式抛撒干扰特性  

Analysis on the Gas Interference Characteristics During the Transonic Gasbag Separation of Cluster Munition

作　　者：王金龙[1] 王浩[1] 江坤[1] 陶如意[1] 

机构地区：[1]南京理工大学能源与动力工程学院,江苏南京210094

出　　处：《北京理工大学学报》2017年第4期348-353,359,共7页Transactions of Beijing Institute of Technology

基　　金：江苏省高校科研创新计划(AE91316)

摘　　要：为分析子母弹囊式抛撒分离过程中气囊破裂后燃气冲击对子弹药动力学特性的影响,通过编译气动耦合求解程序并结合试验研究建立了囊式动态抛撒三维动力学计算模型,分别对0.8 Ma,1.2 Ma,3.0 Ma三种典型马赫数下子母弹囊式抛撒分离干扰过程进行了数值模拟.在此基础上引入了基于目标边界体积的边界网格自适应方法,提高数值模拟对流动分离特性的捕捉和分辨能力.研究结果表明:燃气干扰主要存在于分离初始阶段,随着分离马赫数的增加在来流及激波的强干扰下其作用效果逐渐减弱.燃气干扰的存在对弹体初始分离角速度具有较大影响,在0.8 Ma,1.2 Ma,3.0 Ma分离马赫数下其造成的初始扰动时间分别为12,10,5ms,干扰结束后由于燃气的初始扰动使得弹体角速度值分别增加了54%,97%,3%.To analyze the gas interaction influence on the dynamic characteristics of the sub- munitions during the transonic separation of the cluster munitions, a three-dimensional dynamic model was built and the process of separation under the action of gas interference was simulated based on the experiment tests at the three-typical separation Mach numbers.. 0. 8 Ma, 1.2 Ma, 3.0 Ma. The dynamic characteristics of the sub-munitions caused by the gas interference were analyzed. And a boundary grid adaptive method was used to improve the separation feature. The results show that the gas interference mainly exists in the initial separation phase. With the increase of the separation Mach number, the effect of the gas interference becomes weaker under the influence of the flow field and shock wave. The existence of the gas interference has a certain influence for the angular velocity. The initial disturbance time is 12,10,5 ms which makes the angular velocity value increased by 54% ,97% ,3 % respectively.

关 键 词：燃气干扰 子母弹分离 动力学特性 数值模拟 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]