固相颗粒在C1xb固体火箭发动机中的运动规律

Motion Trajectory of Solid Particles in C1xb Solid Rocket Motor

基于C1xb型固体火箭发动机内流场,对发动机内的凝相颗粒进行受力分析,并获得固相颗粒运动过程中的速度和加速度。建立二维颗粒运动轨迹模型,并在该模型下获得固相颗粒在发动机内的运动空间分布规律。研究颗粒注入位置、粒径及发动机转速对凝相颗粒运动的影响规律。结果表明:从含铝丁羟推进剂上游端和下游端表面离开的颗粒,有着较大概率与壁面发生碰撞;较大尺寸粒径颗粒会增大颗粒运动过程中与壁面发生碰撞的概率;旋转相对于轴向过载更能对颗粒在发动机内的空间分布产生影响。所得固体发动机内两相流流动规律及颗粒沉积分布沉积规律,可为提高固体发动机性能提供理论指导。

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.