随机轨道模型在喷管两相流计算中的应用

Application of stochastic trajectory model to nozzle two-phase flow calculation

应用随机轨道模型对喷管内气-固两相流动进行了数值模拟,结合实验测量结果对使用随机轨道模型和确定轨道模型两种方法的计算结果进行了对比分析,研究了不同固相参数(固相质量比和粒子平均直径)下的固体火箭发动机喷管性能。研究发现,随机轨道模型对实际流动现象的模拟优于确定轨道模型,随着固相质量比和粒子平均直径的增加,喷管两相流损失增加,冲量系数下降。

Gas-solid two-phase flow in the nozzle was numerically simulated by using stochastic trajectory model, and two kinds of calculation results with stochastic trajectory model and determined trajectory model were analyzed and compared with experimental measurement results. For different solid-phase parameters （ solid-phase mass ratio, particle mean diameter）, performances of solid rocket motor nozzle were investigated. It is found that stochastic trajectory model is superior to determined trajectory model in twophase flow field simulation. Two-phase flow loss increases and impulse coefficient decreases with the increase of the solid-phase mass ratio and particle mean diameter.