C323 稠密管群熱交換器内における二次元流動特性(C-32 混相流・機能性流体(2),一般講演)

概要

論文の詳細を見る
A shell-and-tube heat exchanger is widely used in various engineering applications including air-conditioning systems. The geometry and arrangement of heat exchanger tubes is closely related to the performance of heat exchanger. In this type of heat exchangers, boiling occurs outside the heat exchanger tubes and consequently the bubble behavior and void fraction distribution in tube bundles should be understood sufficiently in order to achieve high performance design. The purpose of this study is to elucidate complicated two-phase flow structure in tube bundles through numerical simulations and to estimate desirable tube arrangement patterns. We calculated the two-dimensional void distributions for three patterns of tube arrangement. It was shown that heat transfer characteristics may be improved if tube free areas and downward flow sections are included in the tube bundles.
日本流体力学会の論文
2004-08-09