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Heat transfer characteristics of an impinging inverse diffusion flame jet - Part I: Free flame structure

机译:撞击逆扩散火焰射流的传热特性-第一部分:自由火焰结构

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This is the first part of the experimental investigation on the feasibility of inverse diffusion flame (IDF) for impingement heating. This part is aimed to identify the favorable IDF structure for impingement heating. Seven IDF structures have been observed altogether. Among them the favorable flame structure for impingement heating is identified to comprise a short base diffusion flame and a long pre-mixed flame torch, separated by a contracted flame neck, which acts as a mixing zone for air and fuel and stabilizes the premixed flame torch. This unique flame structure allows the IDF to possess the advantages of both premixed and diffusion flames, with no flashback, high flame temperature and less or no soot emission. The emission measurement shows it emits low level of nitrogen oxides. Its favorable thermal structure and emission characteristics make it a desirable option for impingement heating.
机译:这是关于逆扩散火焰(IDF)用于冲击加热的可行性的实验研究的第一部分。本部分旨在确定用于冲击加热的有利IDF结构。总共观察到七个IDF结构。其中确定了用于冲击加热的有利火焰结构,该结构包括短的基本扩散火焰和长的预混合火焰炬,该火焰炬由收缩的火焰颈分开,充当空气和燃料的混合区并稳定了预混合火焰炬。这种独特的火焰结构使IDF既具有预混火焰又具有扩散火焰的优点,并且没有回火,火焰温度高,烟灰少或无烟尘的特点。排放测量表明它排放出少量的氮氧化物。其良好的热结构和发射特性使其成为冲击加热的理想选择。

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