Abstract: 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.

Key words: font-family:arial, helvetica, sans-serif, font-size:15px, background-color:#FAFAFA, ">solid rocket motor, thermal environment, two-phase flow, solid-liquid bundled rocket