关键词: 固体推进剂火箭发动机;燃烧室;复合推进剂;颗粒;粒度分布;颗粒大小

Abstract: A method to collect high-density particle stream in chamber of SRM was developed.A particle collection facility was designed based on the rule of particle colliding and congregating in high acceleration SRM.Three-dimensional two-phase numerical simulations were carried out to show the feasibility of this method and that the facility could simulate the state of condensed particle in aggregation condition.The particle collecting experiments were carried out by test facility and the case was similar to that in the chamber of rocket motor with 40 g longitudinal and lateral accelerations.The collected particles were analyzed by Scanning Electron Microscope.The coagulate pattern of particle showed that the diameter of particle increasing with concentration of particle cluster.Semiquantitative Statistics was applied to measure the particle size.Co MPared with the particle size distributions measured by laser holographic in normal motor,it can be concluded that particle size under aggregation condition was greater than normal.

Key words: Solid propellant rocket motor;Combustion chamber;Composite propellant;Particle;Granularity distribution;Particle size