导弹发射系统发射内弹道热-流耦合仿真研究

为了研究导弹发射系统发射内弹道特性,采用Fluent软件建立了内置式发射动力系统发射过程仿真模型,使用动网格技术模拟了导弹在发射筒内的运动过程,通过发射系统流场及固体壁面间的热-流耦合计算,得到了导弹发射出筒过程中的能量利用系数。仿真所得的内弹道结果能较好地与试验结果吻合,发射动力系统耗散的热量约为发射筒耗散热量的1/4。所建立的仿真计算模型可为后续仿真工作提供参考,计算所得的能量利用系数可为发射内弹道预示计算提供依据。

Research on Thermal-fluid Coupled Simulation for Launching Interior Ballistics of Missile Launching System

In order to study the properties of launching interior ballistics of missile launching system,a simulation model of thermal-fluid coupling flow field for imbedded launching power system was established by Fluent software. The dynamic mesh method was used to simulate the motion process of missile in the launching cylinder. The energy utilization coefficient of missile launching process was obtained by thermal-fluid coupled calculation between flow field and solid walls of launching system. The simulation results of interior ballistics are in good agreement with the experimental results,and the heat dissipation caused by launching power system is about 1/4 of that caused by launching cylinder. The simulation model can offer reference for subsequent simulation,and the energy coefficients computed can provide basis for the prediction calculation of launching interior ballistics.