【作者】 葛冰； 臧述升； 田寅申；

【Author】 GE Bing;ZANG Shu-sheng;TIAN Yin-shen;Key Laboratory for Power Machinery and Engineering of Ministry of Education,Shanghai Jiaotong University;

【机构】 上海交通大学,动力机械及工程教育部重点实验室；

【摘要】 为了掌握氢燃料燃气轮机双旋流非预混燃烧器的火焰结构特性,设计、搭建了氢燃料燃烧试验平台,利用平面激光诱导荧光法（PLIF）对氢燃料双旋流非预混燃烧流场进行了实验研究,考察了氢燃料N₂稀释对火焰结构的影响,并与其他燃料（CH₄、CO、合成气）火焰结构特性进行了对比。实验结果表明:氢燃料双旋流燃烧火焰结构与其他燃料具有较大差异,在相同当量比下,中热值合成气的火焰张角最小;H₂在离开喷嘴后最先开始发生反应,火焰根部的反应区分布最为均匀;CO的燃料穿透距离最深,火焰的主要反应区最宽;CH₄火焰的主要反·应区最窄,中心回流区径向宽度最小,并且空气旋涡附着在燃烧室周向壁面,稳定性较差。此外,N₂稀释对氢燃料双旋流火焰结构影响明显。随着氢燃料中N₂浓度的增加:火焰亮度变暗,内外锋面及张角不断缩小,主反应区尺寸也随之减小。更多还原

【Abstract】 In order to obtain combustion characteristics of hydrogen flame in gas turbine combustor,experiments have been performed to investigate the flame structures of a double-swirled non-premixed syngas flames.Planar laser induced fluorescence（PLIF） of OH-radical measurement is adopted to identify main reaction zones and burnt gas regions.As the references,experimental investigation on syngas,CH₄ and CO double-swirled flames are presented.Among these four different fuels,experimental result shows that syngas flame shows least spray angle,when H₂ flame starts to burn earliest and burns most uniformly.CO flame has longest fuel penetration depth in flame root regions,and CH₄ flame demonstrates narrowest main reaction zone.Moreover,flame structure of hydrogen with N₂ dilution was investigated.With the increase of N₂ fraction in hydrogen fuel,flame front is gradually stretched,flame opening angle reduces and the main reaction zone shrinks.更多还原