内燃机工程2026，Vol.47Issue(2)：18-27,10.DOI:10.13949/j.cnki.nrjgc.2026.02.003
二次喷射对低负荷工况下汽油压燃燃烧影响的数值研究
Numerical Study of Effects of Double Injection on the Combustion of Gasoline Compression Ignition(GCI)at Low Load Condition
王春强 1唐新华 2莫海俊3
作者信息
- 1. 广西特种设备检验研究院,南宁 530029
- 2. 重庆航天航空技术学院,重庆 400021
- 3. 广西大学 机械工程学院,南宁 530004
- 折叠
摘要
Abstract
In order to address the stability challenges associated with gasoline compression ignition at lowload conditions,the effects of injection strategy parameters on stratification,heat release rates and NO formation were investigated at low load condition.3D simulations were performed using the ANSYS FORTE software to examine the combustion characteristics of iso-octane spray flames in an engine sector.The results indicate that the combustion in some double injection cases was characterized by rapid and concentrated combustion when the fuel distribution was helpful to making the fully oxidation essentially occur in rich zone.The peak of heat release rate increased from 180 J/(°)in single injection to 300 J/(°)in double injection.When the interval time between two injections was fixed at 4.0°,the integral area under p-V curve increased as the split ratio increased from 10%to 40%.When the split ratio was fixed at 20%,there would be a loss of fuel since pilot fuel was injected too early in the case of 12.0° interval time.Compared to those in single injection,NO formation in double injections increases,and soot formation in double injections decreases because of higher in-cylinder temperatures.关键词
汽油压燃/低负荷/二次喷射/放热率/排放Key words
gasoline compression ignition/low load/double ignition/heat release rate/emission分类
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王春强,唐新华,莫海俊..二次喷射对低负荷工况下汽油压燃燃烧影响的数值研究[J].内燃机工程,2026,47(2):18-27,10.
