Abstract: This paper presents an analytical study of the unstable operation of a ramjet in ground testing. A culculation of the characteristics of the measuring system for the combustion chamber pressure is also presented to show the validation of the experimental data, A criterion of combustion stability are proposed on the basis of experiences.

Key words: Oscillation burning;Ramjet engine;Engine test;Pressure measurement;Combustion statility

摘要： 本文针对冲压发动机地面试验中存在的不稳定工作现象进行了分析,并对燃烧室压力测量系统特性进行了计算,以判断所得测量结果的真实性.根据冲压发动机的使用特点,文中还提出了燃烧稳定性要求.

关键词: 振荡燃烧;冲压式喷气发动机;发动机试验;压力测量;燃烧稳定性