Memoirs of the Faculty of Engineering, Yamaguchi University

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Memoirs of the Faculty of Engineering, Yamaguchi University Volume 51 Issue 1
published_at 2000-10

Unsteady Dynamic Simulation in Methane / Air Diffusion Flame

メタン-空気拡散火炎の非定常数値シミュレーション
Kawahara Hideo
fulltext
1.41 MB
A030051000109.pdf
Descriptions
The numerical study is performed to examine the structure of jet diffusion flame with/without a duct in the transitional flow regime, i.e., Re=1000-20000. The flame sheet model of infinite chemical reaction and unit Lewis number are assumed in the simulation. The mechanism of vortex growth is explained by using the streaklines visualized with marker particles, and the interrelation between vortical and thermal strctures is clarified for two cases with/without a duct. The presence of a duct leads to suppression of vortex growth in methane jet and therefore the flame spreading is significantly reduced.
Creator Keywords
Numerical flow visualization
Jet diffusion flame
Transitional flow
Flow and flame interaction