5个待定系数的修正韦伯函数在发动机多火焰区燃烧模型中的应用  

Application of a Revised Weber Function with Five Factors to Be Definedon the Combustion Model with MultiFlame Zones in S.I. Engine

作　　者：林建生[1] 

机构地区：[1]天津大学机械工程学院,天津300072

出　　处：《燃烧科学与技术》2002年第5期457-460,共4页Journal of Combustion Science and Technology

摘　　要：提出了含5个待定系数的修正韦伯函数,并应用多元非线性回归技术确定这些系数,模拟了具有双火焰区燃烧模式和稀燃 速燃特性的汽油机射流燃烧系统燃烧室中混合气的燃烧特性,从而成功地借助示功图分离出对分析整个燃烧过程至关重要的各火焰区中的质量燃烧率和火焰速比等参数,构成了实用的附有双火焰区的三区准维燃烧分析模型。应用实例表明,该函数与多区模型相结合,将在火花点火发动机燃烧模拟中具有强大生命力。In this paper, a revised Weber function with Five factors to be defined by the method of multielement nonlinear regression is put forward for the first time and the combustion characteristics of mixture of two flame zones with lean burn and rapid burn in jet combustion chamber of gasoline engines are modeled. Therefore the most important parameters to the analyses of combustion process, such as mass burning rate and FSR in flame zones are determined successfully by aid of the measurement of indicator diagram . As a result, the effective and useful model of three zones quasidimensional combustion diagnosis with two flame zones is presented. Actual application shows that the new function combined with multizone model processes potential vitality in combustion modeling of S.I. engine. 

关 键 词：待定系数 修正 韦伯函数 发动机 多火焰区 燃烧模型 多元非线性回归技术 射流燃烧室 三区准维燃烧 汽油机 

分 类 号：TK411.2[动力工程及工程热物理—动力机械及工程]