羽根のある場合の円板摩擦の実験

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  • Experiments on Fluid Friction of Rotating Disc with Blades
  • ハネ ノ アル バアイ ノ エンバン マサツ ノ ジッケン

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Experiments on fluid friction of rotating disc which has protuberances on its surface are performed. The author arranged blades radially or concentrically on the disc and on the vessel, and carried out experiments on some combinations of disc and vessel which have blades or smooth surfaces. The main results obtained are as follows : 1) The relation between Cf and Re can be expressed by Cf=α·Re<-0.1575>. 2) The value of α increases first rapidly with the number of blades and then gradually approaches to a maximum value. 3) The shapes of blades (logarithmic and straight) have little influences on Cf for small clearance. 4) The increment value of Cf induced by the blades on disc is nealy twice as much as the value by the blades on vessel. 5) The boss ratio smaller than 0.5 have little influences on the value of Cf.

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