环氧丙烷冲击点火的微观研究

Studies on Shock Ignition Behaviours for Epoxypropane

利用多种光谱技术提出了一种确定燃料冲击点火延迟时间和临界条件的新方法:先用谱仪确定燃料冲击点火最早出现的中间产物,对于环氧丙烷,氧原子辐射总是先出现;把单色谱仪调至氧原子波长处,并利用压力传感器测得冲击波到达样品的时间便可确定环氧丙烷冲击点火延迟时间。这种方法比国内外常用光电二极管(峰值波长约在800nm)的方法更接近实际值。环氧丙烷受冲击后,冲击点火临界马赫数Ma_c=6。

A new method is suggested by some spectra techniques. The delay time and critical condition of shock ignitionare determined using the method, i.e intermediate product of the most early emergence for the Ioaded fuel is determined atfirst using spectrometer, the emergence of intermediate product of O for epoxypropane is after shock ignition is always most ear-ly. The monochrometer is adjusted to wave length of O, and the time of arriving for shock wave is measured by gauge. Thecritical condition of shock ignition for epoxypropane is determined. The result determined by the method is better than that ofusing photo-electric diode whose peak wave length is about 800 nm. The critical ignition Mach number is Ma_c=6.