開放形熱サイフォンにおける熱伝達 : 第1報, 流動状態の観察結果

概要

論文の詳細を見る
The characteristics of free convection heat transfer in an open thermosyphon tube are that the flow is confined in a nerrow space and that the downward flow in the central zone of the tube is induced from the upward free convection flow rising along wall, therby rendering flow pattern more complex. In order to solve the mechanism of this complex flow, it is essential to observe the flow pattern in an open theremosyphon tube. Therefore experiments were carried out with the open theremosyphon apparatus which had a passage of rectangular cross section surrounded by two facing glass plates and two facing heating surfaces. And then flow pattern was detected through the Schrielen method or shadow method. The results of experiments was that flow pattern was grouped into three regimes and that between the steady flow regime and the boundary layer flow regime there was the transition regime in which the flow, unable to reach the stable state, remained in an unstable state accompanied by unsteady up-flow and down-flow, but the mean heat transfer coefficient in this regime was not so harmed.
一般社団法人日本機械学会の論文
1962-08-25