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Critical heat flux test on saw-toothed fin duct under one-sided heating conditions

K Ezato, S Suzuki, K Sato, M Taniguchi, M Akiba2001年Fusion Engineering and DesignIF 1.7出版社

AbstractCritical heat flux (CHF) tests on a new type of rectangular cooling tube, ‘saw-toothed fin duct, SFD’ for high heat flux components were performed under one-sided heating conditions. The tube has internal triangle fins at the heating side to enhance the CHF characteristics. Hydraulic conditions were as follows: axial flow velocity ranged from 2 to 12 m/s. Local pressure at the center of the test sample was 1 MPa and inlet water temperature was 21–25 °C. In the present work, SFD, which has a fin height of 3.46 mm and an installation angle of the fin of 70°, results in the highest CHF of 43 MW/m2 at the axial flow velocity of 10 m/s. This value is 1.3 times higher than that obtained with a Hypervapotron.

日本語訳

新型矩形冷却管「鋸歯状フィン流路(SFD)」の限界熱流束(CHF)試験を、片面加熱条件下で実施した。この管は、片面加熱条件下でのCHF特性を向上させるため、加熱側に内部三角形フィンを有する。水力学条件は以下の通り:軸方向流速は2〜12 m/sの範囲とした。試験サンプル中央部の局所圧力は1 MPa、入口水温は21〜25 °Cとした。本研究では、フィン高さ3.46 mm、フィン取付角度70°のSFDが、軸方向流速10 m/sにおいて最高CHF値43 MW/m²を示した。この値は、Hypervapotronで得られた値の1.3倍である。

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