Abstract: Real time X-ray radiography system was used to observe the slag accumulation and flow of back wall region of submerged nozzle in solid rocket motor. Data and image were obtained. The main conclusions are as follow:(1) There exist slag particles in all back wall region, the particle concentration is lower in the center of back wall region.(2) When the submerged depth varies from 23mm to 33mm, the slag weights increase.(3) As the aera of nozzle throat reduces, the slag accumulation also increases.

Key words: Solid propellant rocket engine;Insert nozzle;X-ray fluorescence analysis;Precipitate

摘要： 利用X射线诊断系统 ,观察了固体火箭发动机热试车条件下潜入喷管背壁区熔渣粒子的溢流过程 ,得到了实验条件下的潜入喷管背壁区熔渣生成沉积数据和图像 ,分析探讨了喷管潜入深度、喷管喉部面积对背壁熔渣生成和溢流过程的影响 ,为发动机的设计提供了实验依据。

关键词: 固体推进剂火箭发动机;潜入式喷管,X射线荧光分析;沉积物