关键词: 过载飞行;固体推进剂火箭发动机;三维流;二相流;数值仿真

Abstract: 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 is lateral direction acceleration on SRM, the far is the point of maximal density of particle flow from aft dome All these results, which are agreed well with experiment data of test motor, can provide some theoretical analysis basis for the research about abnormal ablation of insulator and abnormal combustion of grain

Key words: Overload flight;Solid propellant rocket engine;Two phase flow;Three dimensional flow;Numerical simulation