喷雾锥角对柴油机燃烧过程影响的数值模拟  

Numerical Simulation of Effect of Spray Angle on Diesel Combustion Process

作　　者：李云清[1] 王金成[1] 李天蕾[1] 

机构地区：[1]北京航空航天大学汽车工程系,北京100083

出　　处：《柴油机设计与制造》2006年第2期32-35,共4页Design and Manufacture of Diesel Engine

摘　　要：柴油机燃烧过程中喷雾内部的物理化学过程非常复杂,传热、蒸发、扩散、流动等物理过程控制着化学反应,影响着火和燃烧过程,进而决定着发动机的动力性、经济性以及排放性能。利用CFD分析软件FIRE对一台直列6缸增压柴油机的喷雾与燃烧过程进行模拟。研究了喷雾锥角对燃烧过程的影响规律以及喷雾锥角对碳烟和NOx生成的影响。It is very complex that physical and chemical processes of inner spray in diesel engine combustion. Chemical reactions are controlled by the physical processes, such as heat transfer, diffusing of fuel vapor and gas flow, which influences the ignition and combustion and determines engine torque, power, fuel consumption and emissions. A calculation of spray and combustion of a six-cylinder diesel engine was conducted by CFD simulation tool FIRE. The influence of spray angle on the combustion process and formation of soot and NO, was investigated.

关 键 词：柴油机 数值模拟 喷雾锥角 燃烧 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程] U464.172[机械工程—车辆工程]