Numerical Simulation on Cold-Flow Impact of the Soft Pulse Separation Device in Dual Pulse Solid Rocket Motor

Abstract

Abstract In this paper, the fluid solid coupling in the cold-flow impact process of the soft pulse separation device of dual pulse solid rocket motor is numerically simulated by using ANSYS Workbench software. This paper mainly analyzes the flow characteristics of the flow field near the interlayer, deformation and stress change of interlayer under the cold-flow impact, and obtain the time of the interlayer failure. Finally, the numerical simulation results are compared with the experimental results of cold-flow impact. Finally, at 8.41 ms, the stress at the prefabricated defect of the interlayer reaches the tensile strength, and the pressure at breaking is 0.745 MPa.