0140 DES法によるエルボ配管内高レイノルズ数流れの解析(OS1-7 噴流,後流および剥離流れの流動解析と応用,オーガナイズドセッション)

概要

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In elbow pipe flow, flow-induced vibration is caused by separated flow which occurs at downstream of the elbow. To evaluate flow-induced vibration, it is necessary to accurately simulate pressure fluctuation for the large diameter elbow pipe adopted in the Japan Sodium-cooled Fast Reactor (JSFR). However, it is difficult because of the insufficiency of grid resolution near wall in high Reynolds number flow. Detached Eddy Simulation is applied to the elbow pipe flow of high Reynolds number (3.6×10^6) in this report. As a result, 10Hz peak of the power spectral density of pressure fluctuation and mean velocity distributions around separated region are in good agreement with the experiment. However, in the case which differs in inlet velocity distribution, 10Hz peak is not observed and mean velocity distributions are not agreement with the experiment.
2009-11-06