固体火箭发动机燃烧室凝相粒子的收集与分析

Collection and analysis on the condensed-phase particles in the chamber of SRM

设计了一种新的固体火箭发动机燃烧室状态粒子收集装置,可对不同工作压强和燃烧室滞留时间的凝相粒子进行收集。针对典型的HTPB推进剂,开展了不同压强条件下的实验研究,利用马尔文粒度分析仪和扫描电镜,对收集到的粒子进行了分析。结果表明,典型含铝复合推进剂凝相燃烧产物的粒径主要分布在0.05-100μm之间,粒子粒度的体积分布峰值小于5μm。随着压强的增加,粒度分布峰值略有上升,粒径分布更为集中。

A new device was designed to collect the condensed particles in the chamber of SRM under different operation pressures and different retention time. The typical HTPB composite propellant containing 18.5% aluminum was experimentally investigated under different operation pressures, and the collected particles were analyzed by means of Mastersizer 2000 and SEM. The results show that particle size of combustion products of the typical HTPB composite propellant containing aluminum is between 0.05-100μm, and volumetric distribution peak value of particle size is less than 5 μm. With the increase of the pressure, particle degree distribution peak value is slightly raised, and diameter distribution is concentrated.