Study on Flow Near the Impeller Outlet of a Winnowing Fan. 1st Report. The comparisons of the Flow between Experiments and CFD.

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  • 唐みファンの羽根車出口部近傍の流れに関する研究　第１報　　羽根周辺の流れについてのＣＦＤと実験値との比較
  • トウミ ファン ノ ハネグルマ デグチブ キンボウ ノ ナガレ ニ カンスル ケンキュウ ダイ1ポウ ハネ シュウヘン ノ ナガレ ニ ツイテ ノ CFD ト ジッケンチ ト ノ ヒカク

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The winnowing fan used for head feeding type combines draw in air along the axis from the inlet of both sides, and then radially discharges it into scroll. Therefore, the internal flow of this fan shows a strong three-dimensionality and the efficiency is low. In order to improve the efficiency and make the axial distribution of discharge flow uniform, the experimental and numerical investigations were carried out. Numerical results using CFD agree well with experimental ones for the mean flow. It is found that this numerical simulation method is useful for investigation of the effect of blade and casing configurations. Moreover unsteady flow conditions in the impeller though rotations are shown. For example, in the impeller, a vortex formed around the leading edge of the blade, grows connect with another one, reduce and disappear.

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