Fundamental study for minute-fluctuating-pressure measurements on arbitrary three-dimensional fans

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  • 任意三次元ファンの微小変動圧計測の為の基礎研究
  • ニンイ サンジゲン ファン ノ ビショウ ヘンドウアツ ケイソク ノタメノ キソ ケンキュウ
  • ニンイ 3ジゲン ファン ノ ビショウ ヘンドウアツ ケイソク ノ タメ ノ キソ ケンキュウ

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Abstract

This paper concerns a fundamental approach to develop the measuring technology for minute fluctuating pressures on the three-dimensional blade surfaces of the fan which rotates with an arbitrary rotation-axis direction. Using air as working fluid, a pressure transducer rotating with an arbitrary attitude is closely sealed by a twofold shroud system. The rotational motion with an arbitrary attitude is produced by fixing the pressure transducer to the cantilever which is connected to a motor-driven disc. To conclude, we have quantitatively determined governing effects upon the non-effective component of the pressure-transducer signal, which are the centrifugal-force and the gravitational-force effects.

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