燃烧室结构对稀燃天然气发动机性能的影响  

Influence of the Combustion Chamber Structure on the Lean Burn CNG Engine Performance

作　　者：司鹏鵾 张惠明[1] 杨志勇 张自立 焦运景[1] 程辉 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072 [2]承德石油高等专科学校汽车工程系,承德067000 [3]东风南充汽车有限公司,南充637000

出　　处：《农业机械学报》2009年第4期53-57,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家“863”高技术研究发展计划资助项目(2006AA11A1B2)

摘　　要：阐述了稀燃天然气发动机缸内不同气体运动及其产生机理,分析了缸内气体运动对发动机燃烧过程的影响。针对稀燃天然气发动机的燃烧过程,设计了不同结构形状和尺寸的燃烧室,并分别通过数值模拟和试验方法,就不同结构的燃烧室对天然气发动机性能的影响进行了研究。结果显示,产生湍流强度大的燃烧室燃烧速度快,动力性和经济性较好,而NOx排放量也较大。This paper presented the different mass motion and the mechanism, analyzed the effect of the mass motion on the combust process of the engine. Combustion chambers with different structure and size that fit the combustion of the lean burn CNG engine were given and the effect of the chambers with different structure on the performance of CNG engine was studied through numerical study and experiment. The result shows that the combustion of lean burn engine with high turbulence chamber is fast, provides more power and economic performance, but high NOx emissions.

关 键 词：天然气发动机 燃烧室 稀薄燃烧 性能 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]