摘要
利用CHEMKIN软件,对掺氢比例为10%、15%、20%和25%的天然气混合燃料对HCCI内燃机燃烧特性的影响进行模拟,并对其进行数据分析。结果表明:(1)氢气比例不同,可对天然气的燃烧速率产生影响;比例为10%时,对天然气的燃烧过程影响不明显,却显著提前了天然气燃烧时的着火时刻,但随着掺入氢气比例的增加,着火时刻提前的现象逐渐推迟。(2)随着掺氢比例的逐渐增加,缸内压力、缸内温度、中间产物CO的排放量的峰值均逐渐减小;累积气相反应放热量逐渐减小;掺氢热效率和气相反应净产热量在氢气的掺入比为10%~15%之间时达到峰值。(3)在尾气排放中,随着掺氢比例的增加,CO2生成时刻提前,生成量未改变;NO含量的峰值和排放量随着掺氢的比例增加而增加。
In this paper,CHEMKIN numerical simulation software was used to simulate the influence of natural gas fuel with different hydrogen-doped ratios of 10%,15%,20%and 25%on the combustion characteristic of HCCI internal combustion engine,and analyze the data.The conclusions are show:(1)Different hydrogen-doped ratios impact the combustion rate of natural gas;10%of such a ratio does not impact on the combustion process obviously,but makes the ignition moment advanced much,with the increase of hydrogen addition,such advanced ignition becomes delayed gradually.(2)In the process of combustion,with the gradual addition of hydrogen,the pressure and temperature in the cylinder and the exhaust volume of CO as the intermediate become lower gradually;so does the heat release from the accumulative gas phase reaction;the thermal efficiency of added hydrogen and the net heat production of gas phase reaction reach the peak value when the hydrogen-doped ratio is 10%to 15%.(3)In exhaust emission,with the addition of hydrogen,the generation moment of CO2 becomes advanced and its generation volume keeps the same;the NO peak content and exhaust volume increase with the addition of hydrogen.
作者
佟灵茹
潘江如
何龙
何田
张成
Tong Lingru;Pan Jiangru;He Long;He Tian;Zhang Cheng(Xinjiang Institute of Engineering,Urumqi 830052,China;Xinjiang Agricultural University,Urumqi 830052,China)
出处
《低温与超导》
CAS
北大核心
2020年第8期101-106,共6页
Cryogenics and Superconductivity
基金
新疆“天山英才”人才培养项目(2018tsycxgy-005)
新疆维吾尔自治区高校科研计划项目(xjedu2018I019)。
关键词
CHEMKIN
掺氢比例
HCCI内燃机
燃烧速率
CHEMKIN
Hydrogen-doped ratio
HCCI internal Combustion engine
Combustion characteristics
