気ほうを含んだ液体の管内流動に関する研究(第2報) : 二重管の場合

概要

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An experiment was conducted on the double pipe, which consisted of the experimental apparatuses mentioned in the 1st report, and the annular space, into which air was blown, was made the upriser and the inner pipe, the downcomer. We got the same results as those of the 1st report qualitatively, but a little different quantitatively due to the fact of the difference of single pipe and double pipe and the change of methods of blowing of the air. The frictional coefficient λ for the flow is expressed in this case as κΨ(K)=(λ-λ_0)υ^<1,2>/4m, in which Ψ is a function of K, m is hydraulic mean depth, λ_0 is 0.045 which corresponds to large Reynold's number for the range of serious agitation by the air bubbles, K is the denseness factor of the bubbles.
社団法人日本機械学会の論文
1956-09-25