喷雾爆震起爆过程实验观察  

Experimental Observation of Spray Detonation Initiation

作　　者：李牧[1,2] 严传俊[1] 

机构地区：[1]西北工业大学动力与能源学院,西安710072 [2]中国工程物理研究院流体物理研究所,绵阳621900

出　　处：《燃烧科学与技术》2010年第2期143-148,共6页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50336030)

摘　　要：实验测量了爆震室内不同轴向位置的压力和离子信号的演变过程,并利用高速阴影系统直接观察了透明方形管道内汽油/空气两相混合物动态填充过程中,弱火花点火后火焰加速传播、火焰与障碍物的相互作用、激波的出现、热点形成、爆燃向爆震转变、爆震波在障碍物管道中和光滑管道中的传播过程,分析影响爆震波传播速度的关键因素,用烟膜板记录了起爆区的胞格结构.In two-phase pulse detonation engines, processes of detonation initiation in multiphase mixture are observed through shadowgraph. Gasoline and air are used as fuel and oxidant, and what makes this paper different is that all the experiments are carried out in dynamic two-phase fluid, just like the case in a running pulse detonation engine. Pressure and ion histories are probed in the detonation chamber. Shadowgraphs are recorded by high speed camera to investigate spark ignition, flame initiaiton and acceleration, interactions of obstacles and flow, initiation of shock waves, hotspots, deflagration to detonation transition, propagation of detonation in tubes with and without obstacles. Cell structure is also recorded by smoke foil.

关 键 词：喷雾爆震 障碍物 爆震起爆 阴影 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程] O382[理学—流体力学]