Abstract: The inner flow field in solid rocket motor with crack was calculated with method of N-S equation plus particle simulation. The results demonstrate that the model can accurately simulate the influence brought about by the crack in the solid rocket motor on the inner flow field. And besides, the influence brought about by flow in annular lacuna on mainstream is more important than that in axial lacuna. The influence by upstream flow is more significant than the downstream flow in annular lacuna, and the influence maintains until the nozzle. The flow in annular lacuna near the grooves has less impact on the mainstream.

Key words: Solid propellant rocket engine;Crack;Flow distribution;Model;Navier-Stokes equation;Numerical simulation

摘要： 利用"N S方程+粒子仿真"方法来计算含缺陷固体发动机的内流场,计算结果表明:该模型可以很好模拟裂纹对发动机内流场的影响,同时指出环形裂纹内的流动对主流的影响大于纵向裂纹,环形裂纹内上游位置流动对主流的影响较下游位置的大,并可以保持到喷管喉部,翼槽附近的环形裂纹内的流动,对主流的影响相对较弱。

关键词: 固体推进剂火箭发动机;裂纹;流动分布;模型;纳维尔斯托克斯方程;数值仿真