运用颗粒轨道模型对固体火箭发动机长尾喷管内流场两相流进行了数值模拟,通过与纯气相流场的对比研究了粒子相对喷管流场的影响规律,分析了1~100µm不同直径颗粒的运动特性及分布特征。结果表明,颗粒相的加入对长尾喷管内流场带来很大影响,颗粒相的运动轨迹与颗粒直径密切相关,颗粒分布和颗粒沉积特性与颗粒运动轨迹具有内在联系,为两相流条件下长尾喷管的热防护试验研究提供了一定依据。

Numerical simulations of gas-solid two-phase in tail-pipe nozzle were carried out using particle trajectory model. The simulation results were compared with that under the situation of pure gas. The particle trajectories and parameters in internal flow were studied when particles' diameter changed in the range of 1µm to 100μm. The result shows that the addition of particle phase influences the internal flow field. The trajectory of particle varies with the diameter of particle. The particle concentration and accretion are related to the trajectory of particles. These conclusions may be of certain importance to the thermal-protection of tail-pipe nozzle.