正戊醇/正十二烷二元燃料不同喷射压力下燃烧与排放特性  

Combustion and Emission Characteristics of N-Pentanol/N-DodecaneBinary Fuels Under Different Injection Pressures

作　　者：胡志清 黄星翰 钟汶君[1] 颜飞斌 何志霞 王谦[1] HU Zhiqing;HUANG Xinghan;ZHONG Wenjun;YAN Feibin;HE Zhixia;WANG Qian(School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China;Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,镇江212013 [2]江苏大学能源研究院,镇江212013

出　　处：《内燃机工程》2024年第1期28-36,共9页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金面上项目(52076103)。

摘　　要：为探究戊醇燃料对于发动机的适应性,建立了正戊醇/正十二烷二元燃料的燃烧模型,探究了不同喷射压力下二元燃料的燃烧与排放特性。结果表明随着二元燃料中戊醇比例的增加,平均指示压力的降低和未燃燃料的增加导致指示热效率降低;同时缸内低温区域和低当量比区域增加,氮氧化物和碳烟排放均降低;但不完全燃烧增多,因此一氧化碳和未燃碳氢排放增加。此外,提高喷射压力增强了二元燃料的雾化效果,缸内平均温度提高,高温富氧区域增多,氮氧化物排放增加而碳烟排放降低。由于不完全燃烧的减少,一氧化碳和未燃碳氢排放降低,但由于喷射压力为300 MPa时易出现撞壁现象导致二者再度升高。In order to investigate the adaptability of pentanol fuels to engines,a combustion model of npentanol/n-dodecane binary fuel was developed based on experimental data to investigate the combustion and emission characteristics of binary fuels at different injection pressures.The results show that as the blending ratio of n-pentanol in the binary fuel increases,the decrease in indicated mean effective pressure(IMEP)and the increase in unburned fuel leads to a decrease in indicated thermal efficiency(ITE).At the same time,the low-temperature region and low-equivalent-ratio region in the cylinder increases,and both nitrogen oxides(NOx)and soot emissions decreases.However,incomplete combustion increases carbon monoxide(CO)and hydrocarbon(HC)emissions.In addition,the increase in injection pressure enhances the atomization effect of binary fuels,the average in-cylinder temperature increases,the high-temperature oxygen-rich area increases,and NOx emissions increase while soot emissions decrease.Due to the reduction of incomplete combustion,the CO and HC emissions decrease,but they increase again due to the tendency of the wall impact phenomenon at the injection pressure of 300 MPa.

关 键 词：正戊醇 正十二烷 喷射压力 燃烧 排放 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]