Analysis of the aerodynamic impact of the dispenser stance for the separation of cluster munitions

Abstract

In order to analyze the effect on the dynamic characteristics of the submunitions when subject to different separation conditions during cluster munitions separation, the separation processes are simulated by combining compressible unsteady Arbitrary Lagrange-Euler equations with a six degree-of-freedom parallel calculation program. The separation dynamic characteristics are calculated for six sets of separation conditions: with initial separation velocities of 8 m/s and 16 m/s, and separation angles of 3°, 5° and 7°. The aerodynamic interaction processes of the shock wave and the nonlinear aerodynamic characteristics are also analyzed. To verify the accuracy of the simulation, supersonic wind tunnel experiments were also carried out, the results of which agreed well with the numerical results. The results reveal that the projectile shock wave acting on the submunition serves to provide the pitching moment for the separation motion and causes a sharp change in the dynamic characteristics. The nonlinear dynamic features are characterized by the shock wave interference process in the different separation options.

Keywords

• Cluster munitions
• separation stance
• aerodynamic characteristics
• numerical simulation