Journal of Propulsion Technology ›› 2013, Vol. 34 ›› Issue (1): 62-68.

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Experimental Investigation on Supersonic Combustion Flame Structure with Cavity Injectors

  

  1. Science and Technology on Scramjet Laboratory/Institute of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory/Institute of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory/Institute of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073,China;Science and Technology on Scramjet Laboratory/Institute of Aerospace and Material Engineering, National University of Defence Technology, Changsha 410073,China
  • Published:2021-08-15

凹腔喷射超声速燃烧火焰结构实验研究

范周琴,刘卫东,林志勇,孙明波   

  1. 国防科技大学 航天与材料工程学院/高超声速冲压发动机技术重点实验室,湖南 长沙 410073;国防科技大学 航天与材料工程学院/高超声速冲压发动机技术重点实验室,湖南 长沙 410073;国防科技大学 航天与材料工程学院/高超声速冲压发动机技术重点实验室,湖南 长沙 410073;国防科技大学 航天与材料工程学院/高超声速冲压发动机技术重点实验室,湖南 长沙 410073
  • 作者简介:范周琴(1983—),女,博士,研究领域为超声速燃烧。E-mail:fanzhouqin830227@163.com
  • 基金资助:
    国家自然科学基金(91116001;50906098)。

Abstract: To understand supersonic combustion flame structure with cavity injectors more deeply, the supersonic combustion flowfield of H2 injected from upstream wall of cavity was investigated using OH radical spontaneous emission imaging and planar laser induced fluorescence(PLIF) imaging. The results show that flame is mainly located in vicinity of cavity shear layer and the jet while no flame is observed at exit of injection orifice. The equivalent ratio of fuel, location of fuel injection and cavity configuration have numerious effect on flame structure, which should be considered at design of combustion chamber. 

Key words: OH-PLIF; Spontaneous emission;Cavity shear layer;Flame

摘要: 为加深对凹腔喷射超声速燃烧火焰结构的认识,利用OH基自发辐射成像和PLIF技术对凹腔上游横向喷注氢气的超声速燃烧流场进行研究。结果表明,火焰主要分布在凹腔剪切层附近及喷流内部,喷口附近没有火焰;燃料喷注当量比、燃料喷注位置及凹腔构型对火焰分布和火焰强度影响较大,在设计燃烧室时应加以考虑。 

关键词: OH基PLIF;自发辐射;凹腔剪切层;火焰