低レイノルズ数型κ-εモデルとそれを基礎とする乱流モデルによる船尾流場の数値計算とその妥当性評価に関する研究

概要

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An efficacy of some k - ε turbulence models applying to solve turbulent flow field around a ship model was evaluated. Five k - ε turbulence models were selected from a viewpoint of low Reynolds number effects for these computations. Combined k - ε models with Shih-Lumley's eddy-viscosity expression were also tested. Computational results including time-averaged flow fields, Reynolds stresses, turbulent kinetic energy and dissipation ratio were evaluated comparing to experimental data that were acquired by using triple-sensor hot wire system at wind tunnel. It is found that Shih-Lumley's eddy-viscosity expression was effective to estimate the Reynolds stresses, but not effective to estimate the time-averaged flow fields. Dissipation ratio was over estimated at propeller plane by all of applied models.
社団法人日本船舶海洋工学会の論文
2002-03-25