Flow Field of a Flame in a Channel
Flow Field of a Flame in a Channel
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通道中火焰的流场
DOI：
10.1063/1.1724395
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发表时间：
1959
影响因子：
4.6
通讯作者：
M. S. Uberoi
中科院分区：
文献类型：
--
作者：
M. S. Uberoi
静止火焰在二维通道中稳定，其方式与火焰在通道中传播的情况紧密对应。通过对悬浮在可燃气体中的小颗粒进行频闪照相，绘制了未燃烧气体和已燃烧气体的整个流场。燃烧气体的渐近流场的火焰的流动条件进行了分析。研究了在恒定火焰速度的基础上获得解析流场的可能性。看来，除非燃烧气体区域的通道壁向内移位，否则不存在溶液。这项调查，连同以前的工作，本生火焰的流场，导致一些一般性的评论层流火焰的结构和稳定性。各种预测与实验一致。特别地，在基于恒定火焰速度的理论框架内，凸形火焰是可能的，凹形火焰是不可能的。
A stationary flame is stabilized in a two‐dimensional channel in such a way that it closely corresponds to the case of a flame propagating in a channel. The entire flow field of unburned and burned gases is mapped by taking stroboscopic photographs of small particles suspended in the combustible gases. The asymptotic flow field of the burned gases is analyzed in terms of flow conditions at the flame. The possibility of obtaining an analytic flow field on the basis of constant flame speed is examined. It appears that no solution exists unless the channel walls in the region of burned gases are displaced inward. This investigation, together with the previous work on the flow field of a Bunsen flame, leads to some general remarks about the structure and stability of laminar flames. The various predictions are in agreement with experiments. In particular, the convex flames are possible and concave ones impossible within the framework of the theory based on constant flame speed.