关键词: 喷管喉部;喷管气流;氧化铝;沉积;固体火箭发动机

Abstract: For motors with metallized solid propellant, the condensed metal oxide flow through the nozzle deposits semewhat on the nozzle surface,which effects on the performance of the motor with small throat strongly. Therefore, it is necessary to investigate the deposition regulations .Based on the moving rule of the particles,a theoretical prediction method of the initial deposit velocity is developed in this paper.Some computation examples are given.It is shown that the theoretical results accord with the experiment phanomena.

Key words: Nozzle throat;Nozzle flow;Aluminiun oxide;Deposition;Solid rocket engine