Nonpremixed flame control with microjets

被引:0
|
作者
R. Ganguly
Ishwar K. Puri
机构
[1] University of Illinois at Chicago,Department of Mechanical and Industrial Engineering, m/c 251
[2] Jadavpur University,Department of Power Engineering
来源
Experiments in Fluids | 2004年 / 36卷
关键词
Premix Flame; Soot Formation; Flame Structure; Laminar Flame; Schlieren Image;
D O I
暂无
中图分类号
学科分类号
摘要
The hydrodynamic control of buoyant nonpremixed flames is investigated by injecting high-momentum fluid through a central microjet. The resulting flame characteristics are mapped for jets of different strengths. The flame height decreases linearly with an increase in the microjet Froude number as the flow changes from a buoyancy-dominated to a momentum-controlled regime. The flame luminosity is reduced by injecting stronger microjets. The jets alter the flame structure by establishing strong entrainment of the ambient air from the quiescent surroundings. The introduction of an inert species as the microjet fluid has a similar qualitative effect as air. Microjet assistance is as effective as partial premixing for reducing the flame height and luminosity.
引用
收藏
页码:635 / 641
页数:6
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