研究了封闭圆柱石英腔中化学计量CH4∶O2混合气的燃烧试验。使用了非定域脉冲HF激光触发和直接使用脉冲CO2激光器助燃两种引燃方法。第二种引燃方法是使用小剂量的可以强烈吸收脉冲CO2激光辐射的SF6来加热易燃混合气。研究了燃烧过程,并确定了燃烧辉光的谱线特征。试验表明,即使在小体积反应器中,固定数量反应气的快速激光加热也能够极大地加速燃烧进程并达到混合气燃烧的爆炸模式。得到了阈值情况下沿腔轴的初始温度分布。 The combustion experiment of stoichiometric CH4: O2 mixture in a closed cylindrical quartz chamber was studied. The use of non-localized pulsed HF laser trigger and direct use of pulsed CO2 laser combustion ignition two methods. The second ignition method is to heat the flammable mixture using a small dose of SF6 that strongly absorbs pulsed CO2 laser radiation. The combustion process was studied and the spectral characteristics of the combustion glow were determined. Experiments have shown that rapid laser heating of a fixed quantity of reactant gas, even in small volume reactors, can greatly accelerate the combustion process and achieve an explosive mode of combustion of the mixture. The initial temperature distribution along the cavity axis is obtained for the threshold case.