丁醇-柴油双燃料发动机的燃烧和排放特性试验研究  

Experimental Study on Combustion and Emission Characteristics of Butanol-Diesel Dual Fuel Engine

作　　者：李鑫[1] 董超 韩伟强[1] 刘兴文 李博仑[1] LI Xin;DONG Chao;HAN Weiqiang;LIU Xingwen;LI Bolun(Key Laboratory of Fluid and Power Machinery of Ministry of Education,Xihua University,Chengdu 610039,China;National Automobile Quality Supervision and Test Center,Xiangyang 441004,China)

机构地区：[1]西华大学流体及动力机械教育部重点实验室,四川成都610039 [2]国家汽车质量监督检验中心,湖北襄阳441004

出　　处：《车用发动机》2019年第2期77-84,共8页Vehicle Engine

基　　金：四川省科技厅青年科技创新研究团队项目(2017TD0026);四川省教育厅项目(14ZB0128);西华大学校重点基金项目(z1320315;z1520313);西华大学流体及动力机械教育部重点实验室开放基金项目(szjj2017-084;szjj2017-085);西华大学研究生创新基金(ycjj2017085;ycjj2017087)

摘　　要：为了深入研究丁醇同分异构体在双燃料发动机上燃烧和排放的差异,基于1台重型6缸涡轮增压柴油机,在转速1 500 r/min、缸内循环总能量1 280 J/cycle工况下,针对正丁醇-柴油和异丁醇-柴油双燃料的燃烧和排放特性进行了试验研究。研究结果表明:随着柴油喷射定时的提前,正丁醇-柴油和异丁醇-柴油双燃料燃烧的最大缸内压力相位、放热率峰值相位和θ_(CA10)提前,最大缸内压力、缸内最高平均温度和燃烧持续期增加,放热率峰值和最大压力升高率先增大后减小,HC,CO和颗粒物排放降低,而NO_x排放先增加后减少。在相同的柴油喷射定时和丁醇替代比条件下,相比于正丁醇-柴油双燃料燃烧,异丁醇-柴油双燃料燃烧的θ_(CA10),θ_(CA50)和θ_(CA90)均提前,滞燃期和燃烧持续期变短,最大缸内压力、放热率峰值和最大压力升高率降低,HC和NO_x排放较高,而CO和颗粒物排放较低。In order to further investigate the differences in combustion and emissions of butanol isomers on a dual fuel engine,the experimental study of combustion and emission characteristics was conducted on a heavy-duty 6-cylinder turbocharged diesel engine fueled with n-butanol/diesel and iso-butanol/diesel dual fuel under the condition of 1 280 J/cycle in-cylinder cycle energy at 1 500 r/min.The results show that the phases of maximum in-cylinder pressure,peak heat release rate andθCA10 advance,the maximum in-cylinder pressure,maximum in-cylinder mean temperature and combustion duration increase,the peak heat release rate,maximum pressure rise rate and NO x emission first increase and then decrease,HC,CO and particle emissions reduce with the advance of diesel injection timing in the mode of n-butanol/diesel and iso-butanol/diesel dual fuel combustion.Compared with the n-butanol/diesel dual fuel,θCA10,θCA50 andθCA90 of iso-butanol/diesel dual fuel advance,the ignition delay and combustion duration shorten,maximum in-cylinder pressure,peak heat release rate,maximum pressure rise rate,CO and particle emissions decrease,HC and NO x emissions increase at the premise of using the same diesel injection timing and butanol mixing ratio.

关 键 词：正丁醇 异丁醇 柴油 双燃料 燃烧 排放 

分 类 号：TK421.2[动力工程及工程热物理—动力机械及工程]