超音速子母弹时序抛撒分离干扰特性

为分析在时序抛撒方式下子母弹多体干扰流场特性及其对各舱段弹体气动特性的影响,基于流体控制方程与六自由度刚体运动方程,结合非结构动网格技术,分别对两种时序抛撒方式及后舱子弹单独抛撒方式下的子母弹三维非定常分离流场进行数值模拟,得到不同抛撒时序下的分离流场特性及其气动干扰特性,揭示各舱段子弹在不同分离阶段的气动干扰相互作用过程。研究结果表明:在时序抛撒分离过程中各弹体间激波不断地交错干扰,增加了流场结构的复杂性;前舱子弹的激波干扰使得后舱段子弹气动分离参数较低,分离效率较慢,尤其在短时序间隔下,后舱弹体受前舱子弹干扰较为严重,弹体的安全分离受到影响。

Aerodynamic interference investigation of supersonic cluster munition dispensed by sequential

In order to analyze the multi-body flow characteristics and the aerodynamic interference characteristics for the sub-munitions in different bays under sequential separation. Based on the governing equations of fluid dynamics and rigid body motion equations of 6DOF, the three dimensional unsteady flow field of the cluster munition under two types of sequential separation and single separation style was simulated with the use of the dynamic mesh method. The variation of flow characteristics and the aerodynamic interference characteristics of the sub-munitions in different separation styles was showed and the interaction process of separation between the sub-munitions was revealed as the results. Numerical simulation results show that the flow characteristics get complicated and the aerodynamic separation characteristics of the rear sub-munition become lower than before because of the shock wave interaction between the sub-munitons under the type of sequential separation. The security of the separation between the sub-munitions was affected during short sequential separation.