270 翼形遠心送風機の騒音発生メカニズム : 翼通過周波数騒音とケーシング内共鳴(空力音響現象のメカニズムと計測制御,OS-22 流体関連振動・音響メカニズムと計測制御,総合テーマ「伝統を,未来へ!」)

概要

論文の詳細を見る
The present study intended mechanism clarification of blade passing frequency (BPF) noise generation in wing profile centrifugal blower. First, visualized flow in the vicinity of cut-off that source of BPF noise brought out relation between blade passing and flow. Next, fluctuating pressure on cut-off surface was measured by probe microphone. Distribution of fluctuating pressure pinpointed major source of BPF noise. Measurement of fluctuating pressure on cut-off by probe microphone and detection of blade position by laser brought out relation between blade passing and fluctuating pressure. Measuring transfer function in casing cleared that the noise was amplified by resonance.
一般社団法人日本機械学会の論文
2010-09-14