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https://hdl.handle.net/20.500.14094/0100488640
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2024-06-13
12:48 集計
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0100488640 (fulltext)
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メタデータID
0100488640
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open access
出版タイプ
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タイトル
Transient heat transfer of helium gas for forced convective flow through a narrow tube with different lengths
著者
Suzuo, Narihiro ; Liu, Qiusheng ; Shibahara, Makoto
著者名
Suzuo, Narihiro
著者ID
A1598
研究者ID
1000080294263
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail.html?systemId=74ad545da448b4c6520e17560c007669
著者名
Liu, Qiusheng
劉, 秋生
リュウ, シュウセイ
所属機関名
海事科学研究科
著者ID
A1623
研究者ID
1000070628859
KUID
https://kuid-rm-web.ofc.kobe-u.ac.jp/search/detail.html?systemId=bdca0f1711b710cd520e17560c007669
著者名
Shibahara, Makoto
柴原, 誠
シバハラ, マコト
所属機関名
海事科学研究科
収録物名
Mechanical Engineering Journal
巻(号)
11(2)
ページ
23-00372
出版者
Japan Society of Mechanical Engineers
日本機械学会
刊行日
2024
公開日
2024-04-19
抄録
The understanding of the heat transfer process for helium gas cooling in the fusion blanket is important for the development of fusion reactors. This research aims at clarifying the transient heat transfer characteristics of helium gas for turbulent flow in a narrow tube. A circular platinum tube with an inner diameter of 1.8 mm was heated by exponentially increasing heat inputs and cooled by helium gas. The lengths of the tube were 30 mm and 50 mm. The heat transfer coefficients gradually increased for the e-folding time shorter than about 1.5 s. This shows that the heat transfer process is in a transient state for this region. The heat transfer coefficients increased with the increase of flow velocity, and the effect of the flow velocity became weak in the transient state region. By comparing with the experimental results of tube with different lengths, it was obtained that the quasi-steady state heat transfer coefficients for the length of 30 mm were higher than those for the lengths of 50 mm and 90 mm. However, the heated length showed a weak influence for the lengths of 30 mm and 50 mm in the transient heat transfer with a relatively smaller e-folding time. The variation of transient Nusselt number with Fourier number at different Reynolds number describes well the trend for the variation of heat transfer coefficient with e-folding time at different velocities. Based on the experimental data, an empirical correlation was obtained for transient heat transfer at different lengths by using Fourier number.
キーワード
Transient heat transfer
Helium gas
e-folding time
Forced convective flow
Narrow tube
Different lengths
カテゴリ
海事科学研究科
学術雑誌論文
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© 2024 The Japan Society of Mechanical Engineers
This article is licensed under a Creative Commons [Attribution-NonCommercial-NoDerivatives 4.0 International] license.
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資源タイプ
journal article
言語
English (英語)
eISSN
2187-9745
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関連情報
DOI
https://doi.org/10.1299/mej.23-00372
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