多翼ファンの内部流動に基づく比騒音の予測

書誌事項

タイトル別名
  • A Prediction on Specific Noise Based on Internal Flow of a Forward Curved Fan
  • タヨク ファン ノ ナイブ リュウドウ ニ モトズク ヒ ソウオン ノ ヨソク

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抄録

Specific noise which consists of total pressure and fan noise is available to estimate the overall performance. In this study, a prediction theory of specific noise for a forward curved fan is proposed. The specific noises of the fans that have a different number of blades were discussed based on this theory. The predicted total pressure coefficient coincided well with the experiment. The fan noise of MF120 fan (120 blades) became 3.9dB smaller than MF40 fan (40 blades) because the relative velocity was reduced by the slip. It could be predicted quantitatively that the specific noise of MF120 fan was 2.4 dB lower than MF40 fan.

収録刊行物

  • ターボ機械

    ターボ機械 35 (4), 229-236, 2007

    一般社団法人 ターボ機械協会

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