预混燃气高压不稳定燃烧实验研究

以冲压加速器为工程背景，着重研究预混燃气高压不稳定燃烧问题。采用实验方法，分析预混燃气装填压力、配比等因素对不稳定燃烧的影响；采用频谱分析方法，分析诸因素对压力振动特性的影响。实验给出的预混燃气的装填压力及配比的范围，可直接应用于冲击加速器射击实验，这对于减少冲压加速器高压异常事故具有重要的实际意义。

EXPERIMENTAL STUDIES ON HIGH PRESSURE ABNORMAL COMBUSTION OF A COMBUSTIBLE GAS MIXTURE

In this paper,the ram accelerator is taken as engineering background,the high pressure abnormal combustion of a combustible gas mixture is studied.The influence of a combustible gas mixture filled pressure and its equivalence ratio on abnormal combustion is analysized by experiments.The influence of some factors on pressure oscillation is studied by frequency spectrum analysis.The range of a combustible gas mixture filled pressure and equivalence ratio,which are given by experiment,could directly be applied to the ram accelerator,this is of great value to decrease the high pressure abnormal combustion accident of ram accelerator.