燃烧室对4190船用柴油机燃烧及排放性能的影响  

Impact of Combustion Chamber on Combustion Process and Emissions in 4190 Type Marine Diesel Engine

作　　者：黄加亮[1,2] 温朋[3] 尹自斌[1,2] 朱钰[1,2] 

机构地区：[1]集美大学轮机工程学院,福建厦门361021 [2]福建省船舶与海洋工程重点实验室,福建厦门361021 [3]集美大学诚毅学院,福建厦门361021

出　　处：《中国航海》2015年第3期23-28,共6页Navigation of China

基　　金：福建省自然科学基金(2012J01230);福建省科技厅资助省属高校专项基金(JK2013025)

摘　　要：结合4190ZLC-2型船用柴油机电控化改造项目,应用AVL_FIRE专业软件,建立柴油机缸内高压循环的仿真模型,通过台架试验获得缸压曲线,验证模型的正确性。利用该模型研究燃烧室型式、结构参数对燃烧过程和排放浓度等的影响。结果表明:缩口燃烧室的排放性能最好;喉口直径较小时,NOx排放浓度低,但是碳烟排放浓度较高;凸台高度增大使得缸内高温区面积减小,缸内最高温度增大,凸台高度越小,NOx排放浓度越高,但碳烟排放浓度较低;随着凹坑半径增大,缸内最高温度和压力逐渐增大,排放浓度也会受到很大影响。The Influence of the combustion chamber parameters on the combustion process and emission concentrations in the 4190ZLC-2 marine diesel engine are studied with an AVL_FIRE in-cylinder high-pressure cycle model, which has been verified through bench testing experiment. The simulation shows that the combustion chamber with reduced throat performs best. The simulation tells the following facts： With smaller throat diameter, NOx emission concentration is lower while the soot concentration is higher; the increase of center-crown height reduces the high temperature area in cylinder but increase the highest temperature in it; the smaller center-crown height, the higher NOx emission concentration and the lower soot concentration ; With increase of bowl bottom radius, the maximum temperature and the pressure in cylinder increases gradually; bowl bottom radius also has great influence on the emission of diesel engine.

关 键 词：船舶工程 4190ZLC-2型柴油机 喉口直径 凸台高度 凹坑半径 燃烧室 排放浓度 

分 类 号：U664.1[交通运输工程—船舶及航道工程] TK423.5[交通运输工程—船舶与海洋工程]