沸騰熱伝達に及ぼす管群の効果について : 第2報,管群効果に及ぼす因子についての検討

概要

論文の詳細を見る
For tube bundles of flooded evaporators, boiling heat transfer coefficients are improved by upward streaming vapor bubbles. The authors tried to clarify the relations between boiling heat transfer characteristics of single tubes and those of tube bundles. In this report, the effects of void fraction and bubble-rising velocity on boiling heat transfer characteristics are investigated. Experimental results are summarized as follows : (1) though bubble-rising velocity depends only on the total heat flux of lower tubes with void fractions below 90%, void fraction depends on both the total heat flux and the level of liquid when unheated ; (2) the effects of tube bundles on boiling heat transfer should be evaluated both by bubble-rising velocity and by void fraction ; (3) and effects of void fraction become larger under smaller temperature differences.
一般社団法人日本機械学会の論文
1988-01-25