激波聚焦引燃可燃混合气体的实验研究  

Experimental investigation on ignition of combustible mixture by shock focusing

作　　者：王春[1] 韩肇元[1] 司徒明[2] 

机构地区：[1]中国科技大学力学与机械工程系,安徽合肥230027 [2]航天科工集团公司31所,北京100074

出　　处：《推进技术》2004年第1期78-81,共4页Journal of Propulsion Technology

基　　金：国家自然科学基金(10072061)

摘　　要：在94mm×94mm方截面激波管上,入射激波马赫数为1 60～1 95内开展了汽油/空气可燃混合气体在激波聚焦方式下的点火实验。当汽油/空气混合比处于化学恰当比附近,激波马赫数为1 69～1 95的激波聚焦能够成功地引燃汽油/空气的可燃混合气体,而当入射激波马赫数低于1 69时,同样条件下的汽油/空气混合气体不能被点燃。流场的纹影照片显示,与未燃状态相比,汽油/空气可燃混合气体被引燃后的反射激波波面变宽。Experiments were conducted in a 94 mm×94 mm rectangular-cross-section shock tube to investigate the characteristics of ignition of combustible mixture by shock focusing with the incident shock Mach number range of 1.60-1.95. The results show that combustible mixture of gasoline/air can be ignited by this type of shock focusing in the incident shock Mach number range of 1.69 -1.95, if gasoline/air mixture is near chemical stoichiometric ratio. When the incident Mach number is below 1.69, the gasoline/air mixture cannot be ignited with the same conditions. Compared with the cases of non-combustion, thicker front of reflected shock can be observed on the Schieren photos in the case of combustion.

关 键 词：激波聚焦 可燃气体 点火试验 

分 类 号：V231.24[航空宇航科学与技术—航空宇航推进理论与工程]