进气温度对甲醇发动机燃烧及非常规排放的影响研究  

Study of the Effects of Inlet Temperature on Combustion and Unregulated Emissions of Glow Plug Assisted Direct-injection Methanol Engine

作　　者：吴继盛 吴家正[1] 刘洪运 林易 樊宏彪 WU Ji-sheng;WU Jia-zheng;LIU Hong-yun;LIN Yi;FAN Hong-biao(School of Mechanical Engineering,Tongji University,Shanghai 200092,China;Shanghai Xiaxue Science&Technology Ltd.,Shanghai 200436,China)

机构地区：[1]同济大学机械与能源工程学院,上海200092 [2]上海夏雪科技有限公司,上海200436

出　　处：《内燃机与配件》2020年第3期16-20,共5页Internal Combustion Engine & Parts

基　　金：同济大学横向科研项目(No.kh0100020184220)。

摘　　要：通过模拟软件CONVERGE耦合甲醇氧化详细化学动力学机理,在1台由DH1115单缸柴油机改装而成的电热塞助燃式直喷甲醇发动机上,研究了进气温度对甲醇发动机燃烧及非常规排放的影响。结果表明,提高进气温度,有利于改善甲醇的蒸发及扩散,提高甲醇与空气混合质量,改善燃烧质量、降低非常规排放。当进气温度从300K提高到360K时,压力、放热率和温度峰值提升显著,甲醛及未燃甲醇排放分别减少到了0.1mg·kWh^-1、0.2mg·kWh^-1,降低幅度接近100%。In this study, numerical study was performed for the effects of inlet temperature on combustion and unregulated emissions in a glow plug assisted direct-injection methanol engine using CONVERGE, coupling the methanol detailed chemical kinetic mechanism. The results show that increasing the inlet temperature improves the evaporation and diffusion of methanol. Meanwhile, increasing inlet temperature raises the combustion temperature, which improves the combustion quality of methanol and reduces the emissions. With the inlet temperature increasing from 300 K to 360 K, the peaks of pressure, heat release rate and temperature increase significantly, and the emissions of formaldehyde and unburned methanol are was reduced to 0.1 mg·kWh-1 and 0.2 mg·kWh-1, respectively, with a reduction of nearly 100%.

关 键 词：直喷甲醇发动机 进气温度 燃烧 非常规排放 

分 类 号：U464[机械工程—车辆工程] X734.2[交通运输工程—载运工具运用工程]