240 非定常キャビテーション流れの LES 解析(第一報, キャビテーションモデルの基礎検証)

概要

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We present some preliminary results from validation tests for a cavitation model that was proposed by Okita, et al. This model assumes that the cavitating flow is of homogeneous mixture of the liquid phase and vapor phase and empirically correlates the generation (dissipation) of vapor phase with the difference between the ambient pressure and vapor pressure of the fluid. The model was applied to the computation of two types of unsteady cavitating flows in conjunction with the large eddy simulation based on the dynamic Smagorinsky model : unsteady wake of a rectangular cylinder (prism) at a Reynolds number of (10)^4 and turbulent boundary layer that develops on a Clark-Y 12% thickness hydrofoil at a chord-based Reynolds number of 5.0×(10)^5. In both cases we obtained reasonably good agreements with the corresponding measured data.
社団法人日本機械学会の論文
2003-11-22