スーパキャビテーション二次元直線翼列の数値解析　　非線形キャビティモデルと運動量理論

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  • Numerical analysis of a supercavitating two-dimensional straight cascade. Nonlinear cavity model and momentum theorem.
  • スーパーキャビテーション 2ジゲン チョクセン ヨクレツ ノ スウチ カイセキ

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The hydrodynamic force of a supercavitating cascade is obtained by two methods: the integration of the pressure around the foil surface and the momentum balance due to the velocity diagrams for up- and downstream. since the results by the above two methods are not the same in the linear theory, two kinds of wake models are proposed: Nishiyama's and Oba's models. the purpose of the present paper is to discuss the wake model in the nonlinear theory. First, Pellone and Rowe's cavity model is used and it is shown that this cavity model is not reasonable. Second, a new corrected cavity model is proposed and the discussion of wake models is carried out by the numerical results.

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