The Transition to Instability in a Steady Hydrogen-Oxygen Diffusion Flame
The Transition to Instability in a Steady Hydrogen-Oxygen Diffusion Flame
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DOI：
10.1080/00102207608547527
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发表时间：
1976-10
影响因子：
1.9
通讯作者：
M. R. Dongworth;A. Melvin
中科院分区：
文献类型：
--
作者：
M. R. Dongworth;A. Melvin
流动扩散火焰的喷吹通常不会表现出介于燃烧器附着式火焰和准稳定提升火焰之间的特征。然而，目前的工作描述了贫氢-氧扩散火焰喷出的一个不寻常的中间阶段，在这个阶段，火焰底部呈现出稳定的蜂窝结构。从以前的工作中已知，在接近熄灭时，燃料通过火焰底部转移到氧化剂气流中。在这种稀薄火焰的特殊情况下，由这种流间转移产生的部分预混合导致在火焰底部形成复合的预混合/扩散火焰结构，这很可能是导致蜂窝状火焰的原因。
Abstract —Blow-off of a streamwise diffusion flame does not usually show features intermediate between those characteristic of the burner-attached flame and a quasi-stable lifted flame. The present work has, however, characterised an unusual intermediate stage in the blow-off of a lean hydrogen-oxygen diffusion flame, where the flame base takes on a stable cellular structure. From previous work, it is known that, near extinction, there is transfer of fuel through the base of the flame into the oxidant stream. The partial premixing resulting from such inter-stream transfer gives rise in the particular case of this lean flame to a composite premixed/diffusion flame structure at the flame base which is most probably responsible for the cellularity.