Abstract: A new experimental method combined with RTR techniques was developed to study the distribution pattern of particles in SRM nozzle during static firing test.The distribution pattern of simulated particles in test motor nozzle was studied by this method and some valuable results were obtained.The results show that particles are not uniform distribution when they pass through the nozzle.The further it is away from the axis of nozzle,the lower the particle concentration is.There are particles on whole cross section of nozzle divergent section and this fact shows that there is no“no particles zone”in nozzle divergent section.The results also show that the degree of particles diffusion is higher while the pressure in chamber is higher

Key words: Solid propellant rocket engine;Nozzle flow;Two phase flow;RTR technique +;Particle;Spatial distribution

摘要： 利用ＲＴＲ技术发展了一种新的研究热试车条件下ＳＲＭ 喷管两相流的实验方法。对实验发动机喷管内模拟粒子分布规律的实验研究结果表明： （１） 粒子通过喷管扩张段时并非均匀分布， 离轴线越远， 粒子浓度越小， 轴线处粒子浓度最大； （２） 喷管扩张段整个截面上都有粒子分布， 说明喷管扩张段中不存在 “无粒子区”； （３） 燃烧室压力越高， 粒子烟群的扩散程度越大

关键词: 固体推进剂火箭发动机;喷管气流;二相流;RTR技术~+;颗粒;空间分布