K-2207 狭隘環状流路内対向流リウェッティングの研究(J14-2 & J11 狭隘流路沸騰現象)(J14 & J11 & J12 原子力利用技術と熱問題)

概要

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Rewetting of a hot wall of a vertical-narrow-annular flow passage with closed bottom by gravitationally penetrating liquid was examined by using R-113. When the gap clearance was 5 mm, quenching of the hot wall occurred from the bottom by liquid accumulated in the flow passage although the liquid penetration was limited (CCFL) at the top entry. The relation between the wall superheat and the wall heat flux was quite similar to what was obtained in the pool boiling although the peak heat flux was much smaller than the usual critical heat flux. When the clearance was less than 1 mm, the quenching was not observed and the wall was cooled monotonously. When the clearance was 2 mm, liquid penetration was perceived in some degree, however the heat flux did not increased after the quenching. The quenching velocity in the 2 mm clearance case was one half of that in the 5 mm clearance case.
一般社団法人日本機械学会の論文
2001-08-22