液滴蒸发一维数学模型及其在二甲醚喷雾中的应用  

One-Dimension Model of Droplet Evaporation and Its Application in Dimethyl Ether Spray

作　　者：魏明锐[1] 汪云[2] 刘永长[1] 文华[1] 张煜盛 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074 [2]襄樊学院机械工程系,襄樊441053

出　　处：《燃烧科学与技术》2005年第1期14-18,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(50376018);国家重点基础研究发展规划资助项目(2001CB209207).

摘　　要：描述了液滴蒸发的一维数学模型及其数值求解方法,并且利用该模型首先对单液滴的蒸发过程和定容燃烧室内二甲醚(DME)的喷雾过程分别进行了模拟计算和分析,然后对二甲醚发动机的喷雾燃烧过程进行了数值模拟,并将模拟结果与KIVA程序中原有的Spalding蒸发模型及实验数据进行了对比.结果表明,一维蒸发模型对蒸发过程的描述较Spalding的零维蒸发模型更为真实.A one-dimension mathematical model of droplet evaporation and its numerical solving method were discussed in this paper. The phenomenon was investigated in a constant volume chamber by making simulation on a single droplet evaporation at first, then on the whole spray behavior of DME, and finally on the spray combustion processes in an actual DME engine. The comparison was made out between the simulating results computed by the one-dimension evaporation model, the Spalding evaporation model used in the KIVA-Ⅱ codes, and the experimental data.It shows that the evaporation processes can be described by the one-dimension evaporation model more truly than the Spalding evaporation model.

关 键 词：发动机 蒸发 数学模型 二甲醚(DME) 

分 类 号：TK16[动力工程及工程热物理—热能工程]