粗面および短縮円すい広がり管の効率 : 広がり管効率向上に関する研究

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タイトル別名
  • Pressure Recovery Efficiency of Short Conical Diffusers and of Roughened Diffusers
  • ソメン オヨビ タンシュクエン スイ ヒロガリ カン ノ コウリツ

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抄録

Two methods to delay the separation of flow in short conical diffusers are described. The 10°conical diffusers, the end of which is cut off, have great advantages over the simple conical diffusers of same length when the equivalent angle of divergence is greater than 20°. When the surface in conical diffusers is roughened near and after the separation point the efficiency of the diffusers increases. A method of analysing the effect of boundary layer thicknesses and of separation position on the losses of diffusers, is described.

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