20514 よどみ流平面火炎に及ぼす渦度の影響(第2報)(OS1 反応性流れの基礎と応用へ向けた展開)

概要

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An interaction between flame surface and perpendicularly impinging vortex tube is experimentally studied with stagnating laminar premixed flame. The motion of the flame surface is visualized in the horizontal and vertical sections by a laser tomographic method. Methane/air premixed mixture(φ=0.69) is issued from the outer tube and inner tube to the stagnation plate and then the stagnating plane flame is formed. The mean velocity of the mixture issued from the outer tube is 0.5m/s, while that from the inner tube is varied from 1.2〜1.6m/s. Vortex tube is formed by rotating the inner tube with the rotating speed N=0〜2800rpm. Horizontal visualization images show two types of instability. When N=100rpm, a single deviation of the flame surface toward the premixed mixture is formed, which rotate circumferentially. When N=600rpm, two deviations are formed, which put together and separate repeatedly.
社団法人日本機械学会の論文
2005-03-17