固相颗粒在C1xb固体火箭发动机中的运动规律

The force of condensed-phase particles in C1xb solid rocket motor (SRM) is analyzed based on internal flow field of motor. The velocity and acceleration of particle at different moments are obtained, and a two-dimensional particle motion trajectory model is established. Based on this model, the spatial distribution rule of particles in SRM is obtained. On this basis, the effects of motor rotation, initial position of particle and particle size on the movement of condensed-phase particles are studied. Results show that the particles leaving the upstream and downstream surfaces of aluminized hydroxyl-terminated-polybutadiene propellant have a greater probability of colliding with inner wall. Larger size particles increase the probability of collision with inner wall during particle movement. Rotation has more influence on spatial distribution of particles in motor in comparison with axial overload.