摘要
为了研究火花能量及相位对航发燃烧室点火成功率的影响,采用大涡模拟(LES)方法对轴径向旋流器燃烧室点火过程进行模拟。模拟结果表明增大火花能量至10 J后点火仍具有随机性,同种可燃工况下单脉冲火花点火并非都能建立稳定火焰,且增大火花能量后火花相位对点火成功率的影响并没有得到改善,单个火花能量释放持续时间0.2 ms远小于流场脉动周期8.76 ms是造成火花相位严重影响点火结果的根本所在。在总点火能量相同的前提下在单脉冲点火失败的火花相位进行多脉冲点火,验证了在一个流场脉动周期内采用多个火花脉冲代替单个火花脉冲点火是减小随机性对点火成功率影响的有效途径。
In order to study the effect of spark energy and phase on the ignition success rate of aeroengine combustion chamber,large eddy simulation(LES)method was used to simulate the ignition process of axial radial cyclone combustion chamber.The simulation results showed that the ignition was still random after increasing the spark energy to 10 J.Not all single pulse spark ignitions can establish a stable flame under the same combustible condition,and the influence of spark phase on ignition success rate was not improved after increasing the spark energy.The single spark energy release time of 0.2 ms was far less than the flow field pulsation period of 8.76 ms,mainly accounting for the serious influence of spark phase against the ignition result.Under the premise of the same total ignition energy,the multi-pulse ignition was carried out in the spark phase where the single pulse ignition failed.It was proved that using multiple spark pulses instead of single spark pulse ignition is an effective way to reduce the influence of randomness on ignition success rate in a flow field pulsation period.
作者
李晶茹
黄勇
LI Jingru;HUANG Yong(School of Energy and Power Engineering,Beihang University,Beijing 100191,China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics,Beihang University,Beijing 100191,China;Collaborative Innovation Center for Advanced Aero-Engine,Beijing 100191,China)
出处
《航空动力学报》
北大核心
2025年第3期102-112,共11页
Journal of Aerospace Power
基金
国家科技重大专项(2017-Ⅲ-0007-0032)。
关键词
大涡模拟
火花相位
火花能量
燃烧室
点火成功率
large eddy simulation
spark phase
spark energy
combustion chamber
ignition success rate
