検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Large eddy simulation of a mixing-T experiment

T字合流管内混合現象の水試験に対するLESに基づく熱流動解析

Coste, P.*; Quemere, P.*; Roubin, P.*; Emonot, P.*; 田中 正暁; 上出 英樹

Coste, P.*; Quemere, P.*; Roubin, P.*; Emonot, P.*; Tanaka, Masaaki; Kamide, Hideki

T字合流配管内の温度変動に関する水試験(WATLON)について、Large Eddy Simulationと有限要素法に基づくTRIO-Uコードを用いた実験解析を行った。これまでに実施された直交座標系を用いた有限体積法に基づく解析で生じた実験との不一致は、本解析ではみられなかった。配管内乱流に基づく乱れを周期境界を使ったperiodic boxにより解析体系に与えた。入口でのより現実的な速度変動は物理的に意味のある乱れの発達を促し解析結果の精度を向上させた。主配管の入口側にエルボを設置した体系では、2次流れがT管内の平均温度分布並びに温度変動強度に与える影響が確認できた。

The WATLON experiment, a water facility about fluid mixing in a T-pipe, is calculated with a finite element volume method and a Large Eddy Simulation (LES) approach, with TRIO-U code. Its unstructured tetrahedron grids do not lead to the same noteworthy disagreements previously mentioned with Cartesian grids. Branch and main pipe inlet velocity fluctuations due to turbulence are simulated with the use of "periodic boxes". These more realistic inlet fluctuations allow physical instabilities to develop, improving the predictions. When an elbow is added upstream of the injection, the influence of the secondary flow on temperature averaged values and fluctuations is underlined.

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.