摘要
基于侧卷流燃烧系统(lateral-swirl combustion system,LSCS)良好的油气混合与燃烧效果,在多种实际工况下对侧卷流和ω燃烧系统进行了试验研究,将两者的燃烧及排放结果进行了对比分析,并通过仿真研究揭示其工作机理。试验结果表明:在各种工况下,相比ω燃烧系统,侧卷流燃烧系统的燃油消耗率和碳烟排放均降低,其中燃油消耗率最大降幅为3.83%,碳烟排放最大降幅为82.21%;侧卷流燃烧系统瞬时放热率大,缸压和缸内平均温度更高。仿真结果表明:侧卷流燃烧系统的分流造型及时将燃油导流向壁面两侧,避免了燃油在壁面的堆积,从而有利于充分利用燃烧室周向空气,提高混合燃烧性能,减少碳烟生成。
Based on the better fuel/air mixture formation and combustion of the lateral-swirl combustion system(LSCS),the differences in the combustion and emission results between the LSCS and theωcombustion system were analyzed under different working conditions using a single-cylinder test system.Then a simulation calculation was used to compare the mixture equivalence ratio and velocity of the working medium in the two combustion chambers,elucidating the working mechanism of the two chambers.The test results show that compared with theωcombustion system,the brake specific fuel consumption of the LSCS decreases by 3.83%,and the soot emission decreases by 82.21%under the same operating conditions.And LSCS has higher heat release rate,in-cylinder pressure and temperature.The simulation results show that the fuel jet is separated evenly in both sides of the convex edge after the spray impingement in the LSCS,avoiding the accumulation of the fuel near the chamber wall.Then the LSCS can make full use of the circumferential air in the combustion chamber,improve the combustion,and decrease the soot emission at the same time.
作者
陈金昊
李向荣
魏福华
陈彦林
刘栋
常江
CHEN Jinhao;LI Xiangrong;WEI Fuhua;CHEN Yanlin;LIU Dong;CHANG Jiang(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China;First Military Representative Office of Army Equipment Office in Beijing,Beijing 100072,China)
出处
《内燃机工程》
CAS
CSCD
北大核心
2021年第4期1-7,共7页
Chinese Internal Combustion Engine Engineering
基金
总装备部预研基金项目(104010204)。
关键词
柴油机
侧卷流燃烧系统
ω燃烧系统
燃烧
排放
仿真
diesel engine
lateral-swirl combustion system
ωcombustion system
combustion
emission
simulation
