二次元ブラフボディー形スロットバーナにおける動的渦構造(熱工学,内燃機関,動力など)

概要

論文の詳細を見る
A numerical study was performed to examine the vortical structures for combusting flow from a two-dimensional bluff body slot burner in the transitional recirculating flow. The numerical results support the flow visualization results for C_3H_8 combustion by Chin & Tankin. We identify the fuel effect on the dynamic vortical structures inside the flame for C_3H_8 and CH_4 fuels. The Reynolds number for the inner slot fuel flow is varied from 10 to 250 at a fixed Reynolds number of 400 for the outer slot air flow. The flame sheet model of infinite chemical reaction and the unity Lewis number are assumed in the simulation. As a result of the study on a two-dimensional bluff body burner, it was possible to reproduce the dynamic motions of vortical structures obtained by Chin et al. visualization experiment. In the low Reynolds number region, vortex structures in the recirculating region gives large effect in the flame form. In addition, it was confirmed that independently of the fuel variety, the flow at the bluff-body aft comes into three shape varieties: pre-penetration, penetration transition and penetration regime.
社団法人日本機械学会の論文
2006-05-25