甲烷-空气-稀释气的层流燃烧特性研究  

A Study on the Laminar Flame Characteristics of Methane-Air-Diluent Mixture

作　　者：阎小俊[1] 蒋德明[1] 

机构地区：[1]西安交通大学汽车工程系,西安710049

出　　处：《内燃机学报》2000年第4期353-358,共6页Transactions of Csice

基　　金：国家自然科学基金资助项目! (597760 2 1 )

摘　　要：介绍并分析了甲烷 -空气 -稀释气混合气在定容燃烧弹内进行火花点火预混层流燃烧的试验结果。通过对马克斯坦长度和马克斯坦数的测量研究了火焰拉伸对燃烧速度的影响。结果表明 ,马克斯坦数的数值仅仅与未燃气性质和初始条件相关 ,而与火焰的发展无关。同时在总结试验和计算数据的基础上 ,得到了计算甲烷 -空气 -稀释气层流燃烧速度的计算公式。公式表明 ,对于甲烷 -空气混合气 ,压力对层流火焰的发展起了阻碍作用 。WT5”BZ] The analysis and experiment results of spark igniting premixed laminar combustion of CH 4/Air/Diluent charge in a constant volume combustion bomb have been described.To express the effects of flame stretch upon burning velocity,Markstain numbers has been obtained from the measurement of flame speed.The value of the Markstain numbers are only determined by the physical and chemical properties of unburned gas and the initial condition of system and have no means with the flame development.On the basis of the experiment and computed results,a formula of CH4/Air/Diluent laminar burning speed is developed.It shows that increase of pressure will decrease the laminar flame speed of methane air mixture and on the other hand,increase of temperature would increase the laminar flame speed. [WT5”HZ]

关 键 词：汽车发动机 甲烷-空气-稀释气 层流燃烧特性 

分 类 号：TK16[动力工程及工程热物理—热能工程] U464.174[机械工程—车辆工程]