螺旋/切向气道相异气门的缸内气体分层燃烧分析  

Analysis of Stratified Combustion in Cylinder of Different Spiral/Tangential Air-Passage Valves

作　　者：王应肖 张韦[1] 陈朝辉[1] 蒋倩昱 Wang Yingxiao;Zhang Wei;Chen Zhaohui;Jiang Qianyu(Yunnan Key Laboratory of Internal Combustion Engine,Kunming University of Science and Technology,Kunming City,Yunnan Province 650500,China)

机构地区：[1]昆明理工大学云南省内燃机重点实验室,云南省昆明市650500

出　　处：《农业装备与车辆工程》2021年第3期65-69,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：通过CFD数值模拟,对D19四气门、双进气道发动机进行相异气门的缸内气体分层燃烧分析。研究表明:相异气门可使缸内进气量和涡流比大幅提升;螺旋气道引入方式下的气体,凹坑和燃烧室相对中心区域CO_(2)分布较多。而切向气道引入方式下的气体,靠近切向气道一侧的CO_(2)分布较多,围绕燃烧室中心区域的CO_(2)分布较少;相异气门条件下,发动机排放的Soot和CO大幅减少,NOx略有增加。Through CFD numerical simulation,the stratified combustion analysis of in-cylinder gas with different valves was carried out on the D19 four-valve,dual-port engine.Studies show that different valves can greatly increase the intake air volume and vortex ratio in the cylinder;the gas in the spiral air channel introduction mode,CO_(2) is distributed more in the pit and combustion chamber than that in the central area.For the gas in the tangential air channel introduction mode,CO_(2) is distributed more near the tangential air channel,and less around the center area of the combustion chamber;under different valve conditions,soot and CO emitted by the engine greatly reduced,and NOx increased slightly.

关 键 词：双进气道发动机 相异气门 气体 分层燃烧 

分 类 号：TK421.5[动力工程及工程热物理—动力机械及工程]