D107 原子炉の分岐配管における流動現象に関する研究(OS9 混相流動),動力エネルギーシステム部門20周年,次の20年への新展開)

概要

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Many pipes branch off from a main pipe in industrial plants. Hot water penetrates into the branch pipe with a cavity flow induced by the main flow when temperature of liquid in the main pipe is higher than that in the branch pipe. The penetration causes thermal stratification in the branch pipe. The cavity flow causes a spiral flow with long period fluctuations. The thermal stratification layer fluctuated and caused fluctuations of the wall temperature at an elbow of the branch pipe when the burst phenomena occurred. Visualization tests were conducted to study mechanism of the flow phenomena. It was found that the penetration depth increased with increasing the pipe diameter.
一般社団法人日本機械学会の論文
2010-06-20