内燃机工程2025，Vol.46Issue(1)：57-65,9.DOI:10.13949/j.cnki.nrjgc.2025.01.007
湍流射流点火诱导两次喷射高压直喷甲烷着火规律试验研究
Experimental Study on the Ignition of High-Pressure Direct Injection Methane Ignited by Turbulent Jet Ignition
摘要
Abstract
The ignition and combustion phenomenon of active pre-chamber ignited dual-methane injection jets were investigated in a constant volume combustion chamber with an active pre-chamber and high-pressure injector.The effects of injection ignition delay,the injection pressure of methane and the pulse width of the first methane injection were studied.The results show that,with other conditions remaining unchanged,misfire occurs when the ignition delay(ti)is-30 ms.When ti is increased to-10 ms,an unstable ignition phenomenon occurs,where the flame extinguishes and reignites again.Increasing ti from 0 ms to 100 ms raises the peak combustion pressure from 1.56 MPa to 2.26 MPa and the peak pressure timing advances from 130 ms after ignition to 50 ms.Meanwhile,both the speed of thermal jet and flame increase.For instance,the flame propagation speed increases from 10 m/s to 30 m/s.Furthermore,as the injection pressure increases from 5 MPa to 10 MPa,the peak pressure changes from 0.96 MPa to 2.26 MPa,and peak pressure timing advances from 100 ms to 50 ms.The flame speed in the main combustion chamber increases from 5 m/s to 30 m/s.Additionally,changing the pulse width of the first injection affects both the peak pressure and peak pressure timing as well.Increasing the first injection pulse width from 40 ms to 80 ms raises the peak pressure from 1.87 MPa to 2.26 MPa,and the peak pressure timing advances.However,it has little effect on the thermal jet speed and the flame speed.关键词
湍流射流点火/高压直喷/湍流火焰/甲烷Key words
turbulent jet ignition/high-pressure direct injection/turbulent flame/methane分类
能源与动力引用本文复制引用
臧月研,钟力嘉,刘宗宽,周磊,卫海桥,贾滨..湍流射流点火诱导两次喷射高压直喷甲烷着火规律试验研究[J].内燃机工程,2025,46(1):57-65,9.基金项目
国家自然科学基金重点项目(T2341001) （T2341001）
广西省重点研发项目(GuiKe AB22080084)National Natural Science Foundation of China(T2341001) （GuiKe AB22080084）
Key R&D Program of Guanxi Province(GuiKe AB22080084) （GuiKe AB22080084）
