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利用Euler-Lagrangian方法模拟了固体火箭发动机燃气喷射推力矢量喷管气固两相内流场,研究了固体颗粒对喷管推力矢量性能的影响.气相采用Roe格式和MUSCL(monotone upstream-centredschemes for conservation laws)插值进行空间2阶迎风离散,时间推进采用隐式时间格式;固体颗粒相采用随机轨道模型计算颗粒轨迹,并与气相进行双向耦合.结果表明:固体颗粒的存在使弓形激波强度增强,但降低了推力矢量角和推力系数;颗粒质量分数相同时,粒径越大,推力矢量角和推力系数越大;颗粒直径相同时,颗粒质量分数越大,推力矢量角和推力系数越小.
Euler-Lagrangian method was used to simulate the gas-solid two-phase internal flow field of a solid rocket motor gas injection thrust vector nozzle and the effects of solid particles on the thrust vector performance of the nozzle were studied. The gas phase was Roe format and MUSCL (monotone upstream-centredschemes for conservation laws were used to discretize the 2nd order windward space and the time advancement was implicit time format.The particle trajectory of the solid particle phase was calculated by random orbital model and coupled with the gas phase bidirectionally.The results showed that the presence of solid particles enhanced the intensity of arcuate shock wave, But the thrust vector angle and thrust coefficient are reduced. When the particle mass fraction is the same, the larger the particle size is, the larger the thrust vector angle and thrust coefficient are. When the particle diameter is the same, the larger the particle mass fraction is, the smaller the thrust vector angle and thrust coefficient are.