Research on separation of supersonic cluster munitions based on overlapping grid technology

DOI:	10.11809/bqzbgcxb2023.07.011
Keywords:	cluster munition; multi body separation; overlapping grid; numerical simulation
Abstract:	The separation of cluster munitions at supersonic speeds is a multi body separation problem which includes the interference of multi body motion boundaries and complex aerodynamic flow fields. Based on overlapping grid technology, coupled with hydrodynamics equations and six degree of freedom rigid body motion equations, this paper numerically simulates the multi body separation process of cluster munitions. It also emphatically analyzes the changes of aerodynamic parameters and flow field characteristics of the shock wave generated when the bullet penetrates the master projectile head. The results show that the overlapping dynamic grid technology can well simulate the complex flow field in the process of cluster munition separation. The shock wave of the master projectile will have a great influence on the bullet in the separation process. The rotation of the cluster munitions causes different changes in the lift of the bullet in different positions and makes the bullet separate quickly. Velocity is an important factor affecting the aerodynamic parameters in the separation process of cluster munitions.
Published:	2023-07-28
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