一种缩短碳氢燃料 -空气混合物点火延迟的方法(英文)  

A method for shortening ignition delay of hydrocarbon fuel-air mixture

作　　者：孙英英[1] 韩肇元[1] 司徒明[2] 徐胜利[1] 

机构地区：[1]中国科学技术大学力学和机械工程系,安徽合肥230027 [2]中国航天机电集团三十一所,北京100074

出　　处：《流体力学实验与测量》2001年第2期28-33,共6页Experiments and Measurements in Fluid Mechanics

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundationofChina(1 9882 0 0 5) ;theNationalHigh techResearch&DevelopmentProgram (863

摘　　要：采用激波风洞 激波管组合设备对预混的碳氢燃料———空气混合物的点火与超声速燃烧进行了研究。为缩短碳氢燃料 -空气混合物的点火延迟时间 ,通过激波风洞喷管入口与接触面之间的激波反射对经过雾化与气化的碳氢燃料 (汽油 )进行预热 ;此外 ,由燃烧驱动激波管产生的高温燃气作为引导火焰点燃激波风洞产生的预混与预热的超声速碳氢燃料———空气混合物。采用纹影系统对超声速可燃气流中的火焰传播进行流场显示。实验结果表明 ,上述方法可将碳氢燃料———空气混合物的点火延迟时间缩短至小于 0 .2ms。A combination facility,which consists of a shock tunnel and a shock tube,was used for studying ignition and supersonic combustion of premixed hydrocarbon fuel air mixture.In order to shorten the ignition delay time of hydrocarbon fuel air mixture,an atomized and vaporized hydrocarbon fuel (gasoline) was preheated by shock reflections between the entrance of nozzle and contact surface,which was located between working gas and driver gas,in the shock tunnel.In addition, a hot, burned gas generated from the shock tube was used as pilot flame for igniting the premixed and preheated supersonic hydrocarbon air mixture generated in the shock tunnel.A schlieren system was used for flow visualization of the flame propagating in a supersonic,combustible flow.By means of these methods mentioned above, the ignition delay time of the supersonic hydrocarbon air mixture can be shortened to less than 0.2 ms, and the speed of flame propagation relative to the supersonic,combustible gas was obtained.

关 键 词：激波风洞 激波管 碳氢燃料 点火 超声速燃烧 空气混合物 航空 

分 类 号：V312.1[航空宇航科学与技术—航空宇航推进理论与工程] V211.751