OS9-7 管周方向の壁温分布を利用した冷媒の水平内面ら旋溝付管内蒸発流の流動様式に関する研究(OS9 動力エネルギーシステムにおける熱流動,分散と集中の共存)

概要

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Experiments were carried out on the flow boiling of refrigerants inside a horizontal, spirally grooved steel tube with the 12mm average inner diameter. The circumferential temperature distributions of the tube surface and the axially local heat transfer coefficients of evaporating fluid inside the tube were measured using two fluorocarbons, HCFC22 and HCFC123. Based on both the measured circumferential temperature distributions and trends of average heat transfer coefficients, the liquid film thickness on the tube surface was estimated and discussed. The estimated flow conditions of the experimental data were classified into the four flow patterns, and the flow pattern maps were presented in the form of mass velocity versus vapor quality.
一般社団法人日本機械学会の論文
2006-06-28