高精度・保存的流体計算法の耐風問題への適用性について : その2 地面上の3次元角柱まわりの渦構造と空力特性

概要

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It is generally thought that the vortices shed from a three-dimensional square prism on a ground plane become to have a three-dimensional structure because of the free end. These vortices differ from those in case of a two-dimensional prism, and these are known to evolve into Karman type or Arch type behind a three-dimensional prism according to the aspect ratio of the prism or the Reynolds numbers. These phenomena are highly affected by the downwash over the free end. Here, we numerically simulate the flows around a three-dimensional square prism on a ground plate by use of the interpolation method. First, we estimate the accuracy for the prediction of the flows through the comparison with the previous experimental data. Second, the local aerodynamic characteristics determined by these vortex structures are discussed.
社団法人日本建築学会の論文
1998-01-30