关键词: 火箭发动机;燃烧性能;诊断（物理）;实时显示;图像处理;边缘识别

Abstract: X ray real time radiography (RTR) technique was used to study solid propellant combustion in U type gas generator and double liquid elements nozzle spray flow field,and the RTR images were processed with edge detection technique As the tested objects are of distinct edge gradation,auto threshold technique and optimum filter methods were employed to improve image process effect in the simple edge detection technique With these methods the inner structure of chamber was viewed and the instantaneous combustion rate of solid propellant and ablation rate of insulated sheet were determined The spraying angle and the particles distribution of spray flow field can be obtained in the same way.

Key words: Rocket engine;Combustion performance;Diagnosis(physics);Real time display;Image processing;Edge recognition