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Development of flow-induced vibration evaluation methodology based on unsteady fluid flow analysis for large diameter pipe with elbow in JSFR

JSFRにおける大口径エルボ配管に対する非定常流動解析に基づいた流力振動評価手法の開発

早川 教*; 石倉 修一*; 渡辺 収*; 金子 哲也*; 山野 秀将  ; 田中 正暁 

Hayakawa, Satoshi*; Ishikura, Shuichi*; Watanabe, Osamu*; Kaneko, Tetsuya*; Yamano, Hidemasa; Tanaka, Masaaki

本研究で開発した手法をJSFRのホットレグ配管を模擬した1/3縮尺試験の解析に適用し、計測された応力値と計算値を比較した。その結果、非定常流動解析により得られた圧力変動による応力の計算値は過小評価した。そのため、配管への圧力変動に関する予測精度の向上を試みた。

The present methodology was applied to the analysis for the 1/3-scale experiment of the hot-leg pipe of JSFR, and the predicted stress values were compared with the measured stress values. The predicted stress values were underestimated in the case of using the intact pressure fluctuations obtained by the unsteady fluid flow analysis. Therefore, the improvement of the prediction accuracy of the pressure fluctuations on the pipe wall was attempted.

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