利用棱镜谱仪研究氢燃烧转变为爆轰的过程

Studies on transition from deflagration to detonation of H_2 with prism spectrograph

本文利用Polaroid高速感光底片在一次实验中成功地拍摄到氢燃烧转变为爆轰(DDT)的光谱;利用光电技术研究了氢燃烧转变为爆轰过程中OH基(0.3064μm,0.3428μm)的变化过程.研究表明:在氢燃烧转变为爆轰过程中OH基是逐渐增大的,出现爆轰时OH基出现明显增长;OH(0,0)辐射早于O_2(0,14)辐射,它说明O_2在链式反应中能量比较低,它只有和自由原子和自由基相互碰撞获取高的能量而被激发.

The emission spectrum of the transition from deflagration to detonation for the mixture of hydrogen and oxygen are successfully measured with polaroid high speed film. The evolution of OH radical (0. 3064 μm, 0. 3428 μm) for this transition is also observed by photoelectrical technique. The results show that the OH radical emission for the transition from the deflagration to the detonation gradually increases, when the detonation is formed, OH radical emission obviousely increase. OH (0,0) radical emission is earlier than O2(0,14). These data indicate that the energy of O2in the chain reaction is lower, and O2 are excited via O2 interaction with free- atoms or redicals acquired more energy.