AM06-21-003 噴流列の混合特性に及ぼす脈動の効果(乱流熱物質移動(1),一般講演)

概要

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A jet of pulsating flow was applied to a millimeter-sized multiple air jet array to investigate the cyclic perturbation effect on the mixing performance by using flow visualization and laser Doppler anemometry techniques. The time-mean Reynolds number of the pulsating jet was Re≃1,500. Depending on the phase in one cycle of the pulsating jet, the location of the transition point of the flow from laminar to turbulent varied in the streamwise direction. This affected the time-mean values of the jet flow profile. An adverse change of the mixing performance at the locations near the nozzle and far downstream was obtained between the pulsating and steady jet cases. Namely, a better mixing between the jets was obtained near the nozzle by the pulsating jet case, whereas at the location far downstream, the steady jet case produced a higher performance.
日本流体力学会の論文
2006-09-05