制导航空子母炸弹高速抛撒分离数值仿真

Numerical Simulation Analysis of High-speed Scatters Separation for Guided Aerial Cluster Bomb

制导航空子母炸弹在跨音速抛撒子弹药过程中,子弹药与母弹的分离伴随着复杂的流场和激波干扰,该过程中不仅存在着激波与激波的相互碰撞、部分激波的多次反射,而且由于受到多体运动的相互作用,其气流方向也发生变化,形成了变化复杂的压力、速度分布区域。采用数值模拟的方法对制导航空子母炸弹子弹药高速抛撒分离过程进行了数值仿真分析,应用嵌套网格技术,耦合多体动力学方程以及N-S方程求解子母炸弹高速分离过程,为工程设计、研究提供理论指导与计算依据。

During the sub-munitions dispenser process of the guided aerial cluster bomb in the transonic speed,complicated flow field and shock wave interference accompanied dispersal of sub-munitions and the mother bomb. This process existence not only a collision of the shock wave,multiple reflection part of the shock wave,but also a pressure and velocity distribution area with complex changes,which due to the interaction of multi-body movements and the changes of airflow direction. The paper proposes a numerical simulation method for high-speed scatters separation of guided aviation cluster bomb based on chimera grid,coupling multi-body movement kinetics equation and N-S equations,which provides a theoretical guidance and calculation for engineering design and research.