気水混合流の分岐合流について : 第2報, 本管角, 支管丸の水平分岐管で支管端が本管流中に突き出た場合の分岐損失実験

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  • On the Flow of Air-Water Mixture in a Branch Pipe : 2nd Report, Experiment on the Flow through Horizontal Pipes which Have a Round Branch Pipe Jutting into the Main of Rectangular Section
  • キスイ コンゴウリュウ ノ ブンキ ゴウリュウ ニ ツイテ 2

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In this report, continued from the 1st report, the authors treated experimentally the flow of air-water mixture in the horizontal pipes which have a round branch pipe jutting into the main of rectangular section. First, an experiment on the flow of air-water mixture in a straight rectangular pipe was conducted, and its flow pattern, frictional loss, volume fraction of water and relative velocity were studied and the results were compared with those of a round pipe. The experiment has shown the coefficient of head loss ξb' and ξc' at a cross-branch section respectively as follows. [numerical formula] where ξb' and ξc'=coefficients of head loss at a cross branch section for branch pipe and main pipe respectively. wma' and γma'=real mean velocity and real mean specific weight at a cross branch section which is contracted by the jut of branch pipe end, respectively. wm=mean velocity. γm=mean specific weight. B and D'=height of a side and equivalent diameter of main rectangular pipe respectively. subscripts a, b and c=sections of upper main, branch and lower main pipes respectively.

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