20217 垂直渦管が衝突するよどみ流層流予混合火炎の火炎特性(熱工学(3))

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An interaction between flame surface and perpendicularly impinging vortex tube is experimentally studied with stagnating laminar premixed flame. Premixed mixture is issued from the outer tube (mean velocity: 0.5m/s) and inner tube (mean velocity: 0.22m/s) to the stagnation plate and then the stagnating plane flame is formed. Vortex tube is formed by rotating the inner tube with the rotating speed N=0〜2500rpm. CH_4/Air and C_3H_8/Air mixtures are used. Local burning velocity is determined by using the centerline velocity profile measured by LDV. The local burning velocity increases with increasing vorticity for lean methane/air and rich propane/air flames and vice versa. The change in the local burning velocity with vorticity can be explained by theLewis number effect qualitatively.
社団法人日本機械学会の論文
2006-03-09