検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

高速炉上部プレナム内温度成層化に関する解析手法の基本検証

Fundamental validation of simulation method for thermal stratification in upper plenum of fast reactor

大野 修司  ; 大木 裕*; 菅原 章博*; 大島 宏之

Ohno, Shuji; Oki, Hiroshi*; Sugahara, Akihiro*; Ohshima, Hiroyuki

実用化高速炉の原子炉上部プレナムにおける温度成層化現象を高精度で評価するための手法整備の一環として、多次元熱流動解析コードAQUAと商用CFDコードによる基礎的体系下の水試験の解析を実施した。解析値と試験値の比較から、高次差分法を使用し鉛直方向メッシュ密度を適正化することで、解析コードによらず成層界面の温度勾配,界面の上昇・揺動挙動を適切に予測できることを示した。乱流モデルに標準k-$$varepsilon$$, RNGk-$$varepsilon$$及びRSMを適用した場合の比較では、いずれのモデルともに成層化の基本現象をおおむね再現した。

Three-dimensional thermal-hydraulic analyses of thermal stratification phenomena have been carried out in order to validate simulating ability of single-phase thermal hydraulic code AQUA and commercial CFD codes STAR-CD and FLUENT. The analyses of thermal stratification water experiments demonstrated that the codes reproduced temperature gradient and upward movement of the stratification interface in the case of utilizing appropriate discretization method and computational mesh arrangement for gravitational direction. No remarkable difference was observed between the calculated results with three codes. It was also shown that three turbulence models of standard k-$$varepsilon$$, RNG k-$$varepsilon$$ and RSM indicated little difference in the predicted results of basic stratification phenomena observed in the experiments.

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.