プロペラ・キャビテーションと船尾変動圧力の実用計算法

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タイトル別名
  • Practical Calculations for Prediction of Propeller Cavitation and Propeller Induced Hull Surface Pressure
  • プロペラ キャビテーション ト センビ ヘンドウ アツリョク ノ ジツヨウ ケ

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説明

A practical method for the prediction of cavitation on a propeller operating in a ship wake and hull surface pressure induced by a cavitating propeller is presented.<BR>In this method, the following items are applied : <BR>i) propeller part : the combination of Hanaoka-Koyama's unsteady lifting surface theory and corresponding 2-D wing theory ii) cavitation part : linearized 2-D cavity theory applying the angle of attack and the local cavitation number derived form i) <BR>iii) hull surface pressure part : the application of the method of periodic source in place of cavity volume variation while a propeller blade is turning behind hull, moreover blade loading and blade thickness are included<BR>In order to stand the practical use, correction factors on the cavitation part are adopted from 2-D cavitation test and actual ship observations. The predicted results on blade cavitation and hull surface pressure are compared with measured one, and the advantages of the method are discussed.

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