Study on Flow Near the Impeller Outlet of a Winnowing Fan. 3rd Report. Observations on the Static Pressure Contour Near to Impellers and the Particles Flow Near to Delivery and Suction Ports.

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Other Title
  • 唐みファンの羽根車出口部近傍の流れに関する研究　第３報　　羽根車近傍の静圧等値面と吸込口・吐出し口近傍のパーティクルによる一考察
  • 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3ポウ ハネグルマ キンボウ ノ セイアツ トウ チメン ト スイコミグチ ハキダシ グチ キンボウ ノ パーティクル ニ ヨル イチ コウサツ
Published
2001
DOI
  • 10.1299/kikaib.67.1376
Publisher
The Japan Society of Mechanical Engineers

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Description

This study aimed at clarifying unsteady flow near the delivery port of winnowing fans using CFD technology, the commercially available flow analysis software FLUENT/UNS, and the visualization software AVS. Both standard impellers and forward-inclined impellers were studied for comparison purposes. The results of this investigation demonstrate that forward-inclined impellers have better performance in terms of producing uniform flow. They develop many points where the static pressure is low, and from where large and unstable three-dimensional vortexes are produced. It was also demonstrated that a characteristic of winnowing fans is that they produce a balance between the swirling now after the suction port and that after the delivery port. This means that the flow after the impeller can be made uniform within a short distance.

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