1004 PIVを用いた車両空調用送風機の翼間流れ実験解析(OS10-1 産業界における非定常現象,オーガナイズドセッション)

概要

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The purpose of this paper is to visualize the flow between fan blades and to investigate the correlation of the flow with the noise. First, to visualize the flow, we have developed image-rotator apparatus mainly composed of an image-rotation prism and a high speed video camera. We obtained the circumferential flow patterns through this apparatus and the velocity distribution by Dynamic PIV analysis. Second, to investigate the correlation of the flow with the noise, we have prepared a sound permeability scroll casing for measuring the sound pressure distribution. The flow patterns are classified into two types : a number of unsteady vortexes type and a steady vortex type. The noise levels near the tongue area where various size vortexes occurred were higher than others. In conclusion, this paper suggests that the noise be caused by a number of unsteady vortexes.
社団法人日本機械学会の論文
2009-11-06