反应机理对湍流预混值班火焰稳燃影响的研究  

Effects of Reaction Mechanism on Stabilization of Turbulent Premixed Pilot Flame

作　　者：刘英杰 刘潇 周波 游滨川 郑洪涛[2] LIU Ying-jie;LIU Xiao;ZHOU Bo;YOU Bin-chuan;ZHENG Hong-tao(Aero Engine Academy of China,Beijing 101304,China;College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen 518055,China)

机构地区：[1]中国航空发动机研究院,北京101304 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [3]南方科技大学力学与航空航天工程系,广东深圳518055

出　　处：《推进技术》2020年第10期2276-2282,共7页Journal of Propulsion Technology

摘　　要：针对反应机理对湍流预混值班火焰稳燃的影响,使用大涡模拟(LES)耦合输运概率密度(PDF)方法模拟了湍流射流火焰的燃烧流场。化学反应过程采用被广泛应用的SMOOKE(16组分,46步)和DRM22(22组分,104步)机理,概率密度输运的确定采用欧拉随机场来实现。计算结果表明,LES/PDF模型可以准确地模拟该类火焰的速度分布,火焰褶皱等结构。反应机理的点火延迟时间的准确与否是模拟值班射流火焰的关键,预混射流出口处的小尺度掺混引起的点火和火焰传播过程是值班射流火焰稳燃的关键。Aiming at the effects of different reaction mechanisms on the flame stability,LES coupled transport probability density(PDF)method were used to simulate the combustion flow field of turbulent jet flame.The chemical reaction process uses SMOOKE(16 components,46 steps)and DRM22(22 components,104 steps)mechanism which are widely used,and the probability density transport equation is achieved by Eulerian stochastic fields method.The results show that the LES/PDF model can accurately capture the velocity distribution,flame wrinkle and other small structures.The prediction of ignition delay time is the key factor to accurately simulate the pilot jet flame,and the auto-ignition and flame propagation process caused by small scale mixing at exit of jet are main mechanism of flame stability.

关 键 词：湍流预混火焰 反应机理 大涡模拟 点火 燃烧稳定性 

分 类 号：V231.2[航空宇航科学与技术—航空宇航推进理论与工程]