検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Development of three-dimensional one-way bubble tracking method for boiling flow

加熱管内沸騰二相流への三次元one-way気泡追跡法の拡張

玉井 秀定; 冨山 明男*

Tamai, Hidesada; Tomiyama, Akio*

三次元one-way気泡追跡法は少ない計算資源で気液二相流の時間的・空間的変化を計算できる手法であるが、これまで非加熱の水-空気二相流のみに適用されてきた。そこで本研究では、本手法を加熱管内沸騰二相流の体系に拡張した。まず、液相温度場を計算するために一次元のエネルギー保存式を導入し、気泡と液相の熱伝達を考慮した。その他、径方向液相温度分布や過熱壁での気泡生成,気泡の膨張・凝縮などをモデル化した。実験結果との比較により、構築した手法が、加熱管内沸騰二相流のボイド率分布の傾向を良好に予測できることを確認した。

A three-dimensional one-way bubble tracking method is a promising numerical method for calculation of time-spatial evolution of gas-liquid interfacial configuration with use of a little computing resource. Since the method has been applied to only an adiabatic air-water bubble flow, the method is developed for the analysis of a boiling flow in this study. One-dimensional Eulerian equation of energy conservation for a continuous liquid phase and an interface heat transfer equation for dispersed bubbles are introduced. Then, radial liquid temperature distribution, wall heat transfer between a heated wall and subcooled liquid, bubble generation on a heated wall and expansion or condensation of bubbles are taken into account. The developed method is applied to the boiling flow experiment and radial void fraction distribution is compared. It is confirmed that the method can give good prediction of tendency of the void fraction distribution in the boiling flow.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.