円筒形絞りのキャビテーション特性 非定常流における臨界キャビテーション係数

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タイトル別名
  • Cavitation Performance of Cylindrical Choke. Critical Cavitation Number in unsteady Flow.
  • エントウケイ シボリ ノ キャビテーション トクセイ ヒテイジョウリュウ ニ

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This paper deals with an experimental study on the unsteady performance in the cylindrical choke of the oil hydraulic. Experiments are carried out under an unsteady flow in which the outlet pressure p2 of the cylindrical choke takes the form of a trapezoid varying with time, keeping the inlet pressure p1 constant. It is found that as the absolute value of the rates of pressure change dp2/dt increases, the incipient cavitation number kci shows a tendency to decrease, and the desinent one, kcd, shows a tendency to increase under two geometric parameters: diameter and length of the choke. As the larger absolute values of dp2/dt further increase, the hysterisis between kci and kcd becomes larger for each combination of the cylindrical choke.

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