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Enhancement of subcooled flow boiling critical heat flux for water in tubes with internal twisted tapes under one-sided-heating conditions

Fujio Inasak, Hideki Nariai1998年Fusion Engineering and DesignIF 1.7出版社

AbstractThe heat flux distributions, qw, at the inner cooled wall for the beam irradiated test data using swirl tubes were estimated by solving an unsteady heat conduction equation. The results were compared with the net vapor generation heat flux, qNVG. It was confirmed that the lowest heat flux at the cooled wall was lower than qNVG for all data and this fact might enhance the critical heat flux (CHF) under non-uniform heating conditions. Enhancement of the CHF for the beam irradiated test data was closely connected with the region at qW>qNVG and the CHF multiplier could be related to the non-uniformity factor.

日本語訳

スワール管を用いたビーム照射試験データについて、内側冷却壁における熱流束分布qwを非定常熱伝導方程式を解くことにより推定した。その結果を正味蒸気発生熱流束qNVGと比較した。全データにおいて冷却壁での最低熱流束はqNVGより低く、このことが非一様加熱条件下での限界熱流束(CHF)を促進させる可能性があることが確認された。ビーム照射試験データにおけるCHFの促進はqW>qNVGの領域と密接に関連しており、CHF倍率は非一様性係数と関連づけることができた。

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