プール沸騰の垂直伝熱面上における沸騰挙動に及ぼす圧力の影響

Study on dependency of pressure on boiling behavior on vertical heating surface in pool boiling

小野 綾子 ; 上澤 伸一郎  ; 柴田 光彦 ; 吉田 啓之  ; 小泉 安郎

Ono, Ayako; Uesawa, Shinichiro; Shibata, Mitsuhiko; Yoshida, Hiroyuki; Koizumi, Yasuo

高圧域における沸騰現象の理解と限界熱流束モデルの構築に資するために、2MPaまでの圧力範囲において、プール沸騰垂直面の沸騰挙動を高速度カメラによって観察した。大気圧での沸騰挙動との差異を見出し、広範な圧力範囲における限界熱流束モデルを構築する上で、高圧域で検討すべき現象、パラメタについて考察した結果を報告する。

The boiling behavior was observed up to under 2MPa condition by high-speed camera, where was on the vertical surface in pool boiling, in order to grasp the mechanism of boiling including the bubble coalescence behavior and establish the model to predict the critical heat flux (CHF) under the high pressure condition. From these observations, the differences on the boiling behavior between under the atmospheric condition and higher pressure conditions were pointed out, and the phenomena and parameters to consider under the high pressure condition were considered in order to establish the CHF which was applicable to various pressure conditions.