Numerical simulation on 3-D two-phase flow field in SRM with acceleration load

The 3-D two phase flow in a solid-rocket motor combustion chamber with axial and lateral direction acceleration was calculated. During this calculation, the particle trajectory model was applied, and 2nd order up-wind limited volume methodology was employed to discretize the control equations for the continuous phase. With this method, the two-phase flow under the condition of 20 g, 30 g and 35 g axial and cross direction acceleration was simulated. The results indicate that in such kind of circumstances, particles will impinge dramatically onto the grain and combustion chamber insulation wall in the reverse direction of acceleration action, and change the normal axisymmetry flow status in the rocket motor. In addition, The high-density particles flow is formed on the side wall in the reverse direction of acceleration with the phenomena that the higher the lateral direction acceleration on SRM is, the far the point of maximal density of particle flow from aft dome is. All these results, which are agreed well with experimental data of test motor, can provide some theoretical analysis basis for the research about abnormal ablation of insulator and abnormal combustion of grain.