激波聚焦引燃可燃混合气体的实验研究

推进技术 ›› 2004, Vol. 25 ›› Issue (1): 78-81.

激波聚焦引燃可燃混合气体的实验研究

王春,韩肇元,司徒明

中国科技大学力学与机械工程系;安徽合肥230027;中国科技大学力学与机械工程系;安徽合肥230027;航天科工集团公司31所 ;北京100074

发布日期:2021-08-15

Experimental investigation on ignition of combustible mixture by shock focusing

Dept. of Modern Mechanics, China Univ. of Science and Technology, Hefei 230027, China;Dept. of Modern Mechanics, China Univ. of Science and Technology, Hefei 230027, China;The 31st Research Inst., Beijing 100074, China

Published:2021-08-15

摘要/Abstract

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。

关键词: 激波聚焦+;可燃气体;点火试验

Abstract: Experiments were conducted in a 94mm×94mm rectangular-cross-section shock tube to investigate the characteristics of ignition of combustible mixture by shock focusing with the incident shock Mach number range 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 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.

Key words: Shock focusing~+;Combustible gas;Ignition test

王春,韩肇元,司徒明. 激波聚焦引燃可燃混合气体的实验研究[J]. 推进技术, 2004, 25(1): 78-81.