The stabilization mechanism of lifted diffusion flames
The stabilization mechanism of lifted diffusion flames
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DOI：
10.1016/0010-2180(66)90028-9
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发表时间：
1966-03
影响因子：
4.4
通讯作者：
L. Vanquickenborne;A. V. Tiggelen
中科院分区：
文献类型：
--
作者：
L. Vanquickenborne;A. V. Tiggelen
在常规圆形燃烧器喷出的甲烷自由射流中，测量了气体组成、气流速度、强度和欧拉湍流尺度。从实验数据来看，被提升的扩散火焰的底部似乎锚定在获得化学计量成分的区域。假定湍流燃烧速度Vt等于该区域的气流速度，得到了Vt与湍流参数之间的实验关系式。最后讨论了稳定的条件，用气动流型和燃烧速度的相互作用解释了火焰的喷吹和回落。
Measurements on gas composition, gas flow velocity, intensity and Eulerian scale of turbulence have been made in a free jet of methane emerging from a conventional circular burner into an unconfined atmosphere. From the experimental data it appears that the base of a lifted diffusion flame anchors in a region where a stoichiometric composition is attained. Accepting the assumption that the turbulent burning velocity Vtequals the gas flow velocity in this region, an experimental relation is obtained between Vtand the parameters of turbulence. Finally the stabilization conditions are discussed; blow off and drop back of the flame are explained by the interaction between aerodynamic flow patterns and burning velocity.