遠心送風機における位相共鳴に対する音響共鳴およびボリュート形状の影響

書誌事項

タイトル別名
  • Effects of Acoustic Resonance and Volute Geometry on Phase Resonance in a Centrifugal Fan
  • エンシン ソウフウキ ニ オケル イソウ キョウメイ ニ タイスル オンキョウ キョウメイ オヨビ ボリュート ケイジョウ ノ エイキョウ

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抄録

The effects of acoustic resonance and volute geometry on phase resonance are studied theoretically and experimentally using a centrifugal fan. One dimensional theoretical model is developed taking account of the reflection from the discharge pipe end. It was found that the phase resonance occurs, even with the effects of acoustic resonance, when the rotational speed of rotor-stator interaction pattern agrees with the sound velocity. This was confirmed by experiments with and without a silencer at the discharge pipe exit. The pressure wave measurements showed that there are certain effects of the crosssectional area change of the volute which is neglected in the one dimensional model. To clarify the effects of area change, experiments were carried out by using a ring volute with a constant area.

収録刊行物

  • ターボ機械

    ターボ機械 40 (12), 725-734, 2012

    一般社団法人 ターボ機械協会

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