Compared with using liquid rocket engines,there are a lot of high-temperature solid particles in the solid-liquid bundled rocket,which make the rocket base thermal environment worse.In order to study the influence of high-temperature solid particles on the base thermal environment,firstly,the effect of particle diameter on the jet distribution and the thermal environment in a single solid motor jet was analyzed using a numerical simulation method,and the results were compared with those of a ground test.Further,the effects of high-temperature solid particles on the jet and the thermal environment of the solid-liquid bundled rocket were analyzed and compared with flight data.The results show that high-temperature solid particles can increase the jet temperature and reduce the jet velocity.The larger the particle diameter,the greater the impact on the jet core temperature.The role of high-temperature solid particles cannot be ignored in the study of the base thermal environment.
ZHANG LiangYAN LiSUN PeijieYANG FanWANG HepingREN Jie
采用CEA(Chemical Equilibrium with Applications)计算复合推进剂化学平衡组分及喷管入口参数,随后通过FLUENT对固体火箭发动机喷管-尾喷焰流场进行了一体化数值仿真。采用时间推进法及AUSM空间离散格式数值求解二维轴对称Navier-Stokes方程组,采用k-ε湍流模型模拟喷流与环境大气的掺混,并考虑了H2、CO、HCl在喷流流场中的二次燃烧,运用拉格朗日方法模拟Al2O3颗粒与喷流的相互作用。计算在不同高度和马赫数下展开,给出了不同情况下的流场分布。结果表明,H2、CO、HCl的二次燃烧对喷流流场影响显著;随着高度的增加,喷流流场影响域扩大;随着来流马赫数增加,喷流流场波节数降低。
