PODE/甲醇煤基含氧混合燃料对柴油机燃烧特性的影响研究  

Effect of PODE/Methanol Coal-based Oxygenated Blended Fuels on Combustion Characteristics of Diesel Engine

作　　者：王天婷 王琦 嵇乾 Wang Tian-ting;Wang Qi;Ji Qian(School of Electrical and Information(Transportation),Zhenjiang College,Jiangsu Zhenjiang 212028;School of Automotive and Transportation Engineering,Jiangsu University,Jiangsu Zhenjiang 212013)

机构地区：[1]镇江市高等专科学校电气与信息(交通)学院,江苏镇江212028 [2]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《内燃机与配件》2024年第22期6-9,共4页Internal Combustion Engine & Parts

基　　金：镇江高专校级科研项目“甲醇/PODE燃料缸内燃烧与污染物生成的数值模拟研究”(GZYB202315)。

摘　　要：基于一台四缸增压中冷柴油机,探究不同比例PODE/甲醇混合燃料的缸内压力变化趋势。通过CONVERGE软件耦合PODE/甲醇双燃料化学反应机理,针对不同比例的PODE/甲醇混合燃料,分析其缸内混合气情况、氧气质量变化、温度场变化和主要自由基变化。结果表明,燃用甲醇和PODE混合燃料的蒸发氧化性能提高,甲醇比例提高,燃烧持续期缩短,缸内富氧区域增多。三种主要自由基HO_(2)、H_(2)O_(2)和OH生成趋势与缸内温度变化趋势类似,HO_(2)和H_(2)O_(2)缸内自由基浓度增加,OH自由基高温反应速率加快,氧化活性自由基作用加强,燃烧后期OH累积质量随甲醇比例增加而减少。Based on a four-cylinder turbocharged intercooled diesel engine,the in-cylinder pressure variation trend of PODE/methanol mixed fuel was investigated.By means of CONVERGE software coupled with the chemical reaction mechanism of PODE/methanol dual fuel,aiming at the different proportions of PODE/methanol mixed fuel,the in-cylinder mixture,oxygen quality,temperature field and major free radicals were analyzed.The results showed that the evaporative oxidation performance of methanol-PODE blend fuel was improved,the proportion of methanol was increased,the combustion duration was shortened and more oxygen-enriched areas in the cylinder.The formation trend of HO_(2),H_(2)O_(2)and OH was similar to that of in-cylinder temperature.With the increase of the concentration of HO_(2)and H_(2)O_(2)in the cylinder,the reaction rate of OH radicals at high temperature was increased,and the oxidation of active radicals was enhanced.The OH accumulation mass decreased with the increase of methanol ratio.

关 键 词：PODE 甲醇 燃烧特性 化学反应机理 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]