Rewetting of a hot wall by gravitational liquid penetration into a narrow-annular space was experimentally examined. Experiments were conducted by using R-113 liquid to simulate high-pressure and high-temperature water. When the gap clearance was 5 mm, liquid fell down into the annular space and accumulated in the lower portion of the flow channel. Then, the hot wall was quenched from the bottom by the accumulated liquid. When the gap clearance was less than 1mm, liquid did not penetrate into the space substantially because of the counter-current flow limiting at the top entrance. Therefore, the hot wall was cooled down very slowly and quenching was not perceived distinctly. When the gap clearance was 2 mm, mixed phenomena of the gap clearance 5 mm and 1 mm were observed. The heat transfer characteristics during quenching were quite similar to those in pool boiling. However, the film boiling heat flux and the peak (critical) heat flux tended to decrease with the gap spacing. The rewetting velocity became slow as the gap spacing became narrow. The liquid penetration limiting with the gap spacing might be reflected on this trend.
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10th International Conference on Nuclear Engineering
April 14–18, 2002
Arlington, Virginia, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-3598-7
PROCEEDINGS PAPER
Study on Counter-Current Flow Rewetting in Narrow-Annular Flow Passages
Naoki Sakamoto,
Naoki Sakamoto
Kogakuin University, Hachioji, Tokyo, Japan
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Asanuma Hironobu,
Asanuma Hironobu
Kogakuin University, Hachioji, Tokyo, Japan
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Shimamura Yosihiro,
Shimamura Yosihiro
Kogakuin University, Hachioji, Tokyo, Japan
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Tukudo Masanori,
Tukudo Masanori
Kogakuin University, Hachioji, Tokyo, Japan
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Yasuo Koizumi,
Yasuo Koizumi
Kogakuin University, Hachioji, Tokyo, Japan
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Hiroyasu Ohtake
Hiroyasu Ohtake
Kogakuin University, Hachioji, Tokyo, Japan
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Naoki Sakamoto
Kogakuin University, Hachioji, Tokyo, Japan
Asanuma Hironobu
Kogakuin University, Hachioji, Tokyo, Japan
Shimamura Yosihiro
Kogakuin University, Hachioji, Tokyo, Japan
Tukudo Masanori
Kogakuin University, Hachioji, Tokyo, Japan
Yasuo Koizumi
Kogakuin University, Hachioji, Tokyo, Japan
Hiroyasu Ohtake
Kogakuin University, Hachioji, Tokyo, Japan
Paper No:
ICONE10-22748, pp. 983-988; 6 pages
Published Online:
March 4, 2009
Citation
Sakamoto, N, Hironobu, A, Yosihiro, S, Masanori, T, Koizumi, Y, & Ohtake, H. "Study on Counter-Current Flow Rewetting in Narrow-Annular Flow Passages." Proceedings of the 10th International Conference on Nuclear Engineering. 10th International Conference on Nuclear Engineering, Volume 4. Arlington, Virginia, USA. April 14–18, 2002. pp. 983-988. ASME. https://doi.org/10.1115/ICONE10-22748
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