液体燃料冲压发动机纵向不稳定燃烧的研究注重声振振型结构的确立。具体包括振幅和相位的压力测量,是在发动机的全长十个位置上做出的。采用两种线性声振振型分析实验数据。采用四种特殊振型观察不同进气道/燃烧室组合。这些分析结果有助于验明冲压发动机低频压力振荡产生的机理。纵向压力振荡在目前的液体燃料冲压发动机的研制中带来了严重问题。由于在大振 The research on the longitudinal instability combustion of liquid fuel ramjet focuses on the establishment of sound vibration mode structure. Specifically including the amplitude and phase of the pressure measurement is made in the full length of the engine ten positions. Two kinds of linear acoustic vibration modes were used to analyze the experimental data. Four special modes were used to observe different inlet / combustor combinations. The results of these analyzes help to verify the mechanism of low frequency pressure oscillations in ramjet engines. Longitudinal pressure oscillations present a serious problem in the development of current liquid fuel ramjet engines. Due to the big vibration