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Na冷却高速炉における大口径配管の流力振動評価に関する研究,24; コールドレグ1/7縮尺試験装置を用いた2段エルボ管内流れのPIV計測

Study on flow-induced-vibration evaluation of large-diameter pipings in a sodium-cooled fast reactor, 24; PIV measurement for dual elbow flow using 1/7-scale model of cold-leg piping

江原 真司*; 橋爪 秀利*; 結城 和久*; 相澤 康介 ; 山野 秀将   

Ebara, Shinji*; Hashizume, Hidetoshi*; Yuki, Kazuhisa*; Aizawa, Kosuke; Yamano, Hidemasa

Na冷却高速炉のコールドレグ配管内複雑流動を明らかにするため、2段エルボの1/7縮尺モデルを用いた流動試験を行った。高レイノルズ数領域における剥離渦など、流力振動に影響する非定常性の強い流動場をPIV計測により評価し、また1段エルボの結果と比較することで複数エルボ効果を検証した。

Experiment on flow in a dual elbow has been conducted to clarify the complex flow behavior, using a 1/7-scale model of cold-leg piping of a sodium-cooled fast reactor. Several cases of elbow effects have been examined by using PIV measurement to evaluate flow fields which have strong unsteadiness and resultant effect on flow-induced vibration, e.g. separation vortex in a range of high Reynolds numbers, and also by comparing the result with that of a single elbow.

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