旋转条件下固体火箭发动机三维内流场数值模拟

基于颗粒轨道模型,通过运动方程加入过载加速度的方式建立了旋转条件下固体火箭发动机内三维两相流的数值模型,并利用该模型研究了不同的旋转加速度对固体火箭发动机中粒子运动轨迹以及聚集浓度的影响。结果表明,随着发动机旋转速度的增大,粒子的聚集带逐渐向壁面附近扩散,在发动机的轴向附近形成一个无粒子区域,旋转速度越大,无粒子区域越大;当旋转速度增加到一定值,粒子的聚集带向外扩散至壁面上,在前封头附近的壁面上形成一条与发动机母线成一定夹角的高浓度聚集带。

Numerical simulation on 3D internal flow field of SRM under spinning condition

Based on the particle trajectory model,the numerical model of 3D two-phase flow in SRM under spinning condition was established by putting overload acceleration into kinetic equation,and the effects of different acceleration on moving tracks and concentration of the particles were investigated by means of the model.The results show that concentration band of the particles spreads gradually toward the grain wall with the increase of spinning velocity of motor;a region without particles was formed near axis of the motor; the higher spinning velocity is,the larger the region without particles is;when spinning velocity reaches a certain value,the particle concentration band spreads towards the walls,and a high concentration band at an angle with the motor generatrix is engendered on the forward dome wall.