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首页> 外文会议>ASME International Mechanical Engineering Congress and Exposition >A NUMERICAL STUDY ON A V-SHAPED LAMINAR STRATIFIED FLAME
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A NUMERICAL STUDY ON A V-SHAPED LAMINAR STRATIFIED FLAME

机译：V形层层分层火焰的数值研究

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摘要

A V-shaped laminar stratified flame was investigated by numerical simulation. The primitive variable method, in which the fully elliptic governing equations were solved with detailed chemistry and complex thermal and transport properties, was used. The results indicate that in addition to the primary premixed flame, the stratified charge in a combustor causes the formation of a diffusion flame. The diffusion flame is located between the primary premixed flame branches. The fuel is fully decomposed and converted to some intermediate species, like CO and H_2, in the primary premixed flame branches. Due to the shortage of oxygen, the formed CO and H_2 in the fuel rich region of the premixed flame branch is further transported to the downstream until they meet the oxygen from the fuel lean region. This leads to the formation of the diffusion flame. There is an interaction between the diffusion flame and the primary premixed flame branches. The interaction intensifies the burning speed of the primary premixed flame. Both the heat transfer and the diffusion of hydrogen and some radicals cause the interaction. With the increase of the stratified charge region, the diffusion flame zone is enlarged and the interaction is enhanced.
机译：通过数值模拟研究了V形层状分层火焰。使用了用详细的化学和复杂的热量和传输性能解决了完全椭圆控制方程的原始变量方法。结果表明，除了初级预混合火焰之外，燃烧器中的分层电荷导致形成扩散火焰。扩散火焰位于主预混合的火焰分支之间。燃料完全分解并转化为初级预混合火焰分支中的一些中间物种，如CO和H_2。由于氧气短缺，预混火焰分支的富含燃料区域中的形成的CO和H_2进一步运输到下游，直到它们与燃料贫区域的氧气达到氧气。这导致形成扩散火焰。扩散火焰与初级预混合火焰分支之间存在相互作用。相互作用加剧了主要预混合火焰的燃烧速度。传热和氢的传播既导致相互作用。随着分层电荷区域的增加，扩散火焰区被增大并且相互作用得到增强。

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