基于吸收光谱方法的平面非预混Hencken火焰多参数测量  

Multi-Parameter Measurement of a Planar Non-Premixed Hencken Flame Based on TDLAS

作　　者：王绍杰 顾明明 齐飞[1] 刘训臣[1] Wang Shaojie;Gu Mingming;Qi Fei;Liu Xunchen(School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《燃烧科学与技术》2023年第1期44-52,共9页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(52076137,91941301)。

摘　　要：Hencken炉可以产生均匀稳定的平面火焰,常被用作各种激光诊断技术的标定.本研究设计制造了一种适用于吸收光谱测量的Hencken平面炉,利用CO_(2)在4.2mm带头位置吸收峰的高温敏感性,采用可调谐半导体激光吸收光谱(TDLAS)技术研究了Hencken炉所产生平面火焰的燃烧特性.本研究采用DME作为燃料,同时测量了Hencken炉火焰温度及CO_(2)体积分数的二维分布.当空气/燃料流速与层流火焰传播速度相当时,DME平面Hencken火焰轴向存在温度、产物浓度稳定区.当火焰燃烧稳定时,在此区域内火焰温度、产物浓度保持不变并接近绝热火焰工况.Hencken burner can produce a uniform and stable flat flame and is often used as a calibration source for various laser diagnostic techniques. In this research,a home-made Hencken burner was designed and manufactured,which is capable to provide a near-adiabatic flame condition with dimethyl ether(DME)as the fuel. Based on the high temperature sensitivity of CO_(2)absorbance at 4.2 μm,the combustion characteristics of Hencken flame were investigated by tunable diode laser absorption spectroscopy. The two-dimensional distributions of flame temperature and CO_(2)concentration were measured at different spatial locations. It can be concluded that flame temperature and product concentration remain stable and reach a near-adiabatic state when the air/fuel flow speed matches the laminar flame speed.

关 键 词：Hencken平面火焰 二甲醚 TDLAS 火焰温度 

分 类 号：TK16[动力工程及工程热物理—热能工程]