Noise Characteristics in Partial Discharge of Centrifugal Fans : 1st Report, Low-frequency Noise due to the Rotating Stall

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概要

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• Low-pressure centrifugal fans often produce low-frequency discrete noise, when operating in partial discharge. In this study, an attempt was made to find the cause of low-frequency discrete noise, using various parameters, and as a result, it was demonstrated that the low-frequency noise was ascribable to the rotating stall. Comparative experiments with airfoil vanes and circular thin ones showed that the frequency of low-frequency noise due to the rotating stall was given by the equation fs = 0.72 ni, where n = rotating speed and i = number of cells and that the number of cells was variable depending on the operating point.

• 一般社団法人日本機械学会の論文

著者

• Suzuki Shoji

  Director Noise Control Engineering Center Central Research Institute Ebara Corporation

• UGAI Yoshio

  Senior Researcher, Central Research Institute, Ebara Corporation

• HARADA Hideomi

  Designer, Haneda Product Division, Ebara Corporation

• Ugai Yoshio

  Senior Researcher Central Research Institute Ebara Corporation

• Harada Hideomi

  Designer Haneda Product Division Ebara Corporation

関連論文

• Noise Characteristics in Partial Discharge of Centrifugal Fans : 1st Report, Low-frequency Noise due to the Rotating Stall
• An Experimental Study on Noise Reduction of Axial Flow Fans : 1st Report, Effects' of some parameters on blade elements

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