基于CFD的船用相继增压柴油机切换点燃烧过程对比研究  

Comparative Study on Combustion Process of STC Diesel Engine on Switching Point Based on the CFD

作　　者：李昕光[1,2] 王银燕[1] 张鹏奇 

机构地区：[1]哈尔滨工程大学动力与能源学院,哈尔滨150001 [2]东北林业大学交通学院,哈尔滨150040

出　　处：《船舶工程》2011年第1期18-20,37,共4页Ship Engineering

基　　金：先进机型燃油和增压系统反设计研究(4010103010402)

摘　　要：利用STAR-CD和GT-Power软件对相继增压柴油机在切换点工况下一台增压器工作(1TC)和两台增压器均工作(2TC)的喷雾、燃烧过程进行了多维瞬态对比研究,通过计算得到了1TC和2TC的缸内气体流场、湍动能、温度场等信息.燃烧过程对比研究表明:相继增压柴油机在切换点工况,1TC的进气量充足,燃空当量比小,缸内燃烧情况更加平稳,因此1TC的缸内平均压力高于2TC,缸内平均温度低于2TC.A numerical simulation model for the sequential turbo charging （STC） diesel engine was established by STAR-CD and GT-POWER. Based on the model, the combustion process research when one Or two turbo worked at the switching point was presented and the cylinder velocity and temperature field were obtained at the switching point. The model results showed that the intake flowrate of 1TC was increased, the mixture formation of l TC was more homogeneous and combustion was more complete than the 2TC. Therefore, the cylinder pressure of 1TC is higher than 2TC and the cylinder temperature is less than 2TC.

关 键 词：柴油机 计算流体动力学 相继增压 切换点 燃烧 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程] U664.121[交通运输工程—船舶及航道工程]