Numerical simulation of fluid-structure interaction in SRM under cold-flow impact

The process of impacting adherent casting solid rocket motor under cool-flow impact was simulated using two-way fluid-solid coupling method by ANSYS workbench14.0. In order to truly reflect the interaction between the establishment of the flow field in the cool air impact process and the SRM grain, the impact pressure to the SRM grain was provided with reference to the structure of the shock tube. The process of the establishment and spread of the flow field pressure was simulated, according to the grain deformation under the cool air impact, the maximum deformation position of the grain was determined. The relationship between the amount of grain deformation and flow field pressure gradient was summed up by observing the law of flow field pressure distribution along the axial coupling surface.