らせん管内気液二相流の流動と伝熱 : らせん軸が水平に置かれた場合

概要

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The flow and heat transfer of an air-water two-phase flow in helical coils, whose axis was horizontally placed, were experimentally studied. First, the flow pattern, average void fraction, frictional pressure drop and characteristics of the distribution of the local void fraction at upper and lower pressure drop and characteristics of the distribution of the local void fraction at upper and lower positions of the coil were investigated. Second, variations of the local Nusselt number along the axial and circumferential direction of the coiled tube were examined. At the inside of the bend, the local Nusselt number varied extremely between the upper and lower position of the coil. While, on the outside, there were little differences between them. The relation of the average Nusselt number and volumetric flow fraction was also mentiond.
社団法人日本機械学会の論文
1986-04-25