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题名:
Convective heat transfer characteristics in the laminar and transition region of molten salt in concentric tube
作者: Chen, YS; Zhu, HH; Tian, J; Fu, Y; Tang, ZF; Wang, NX
刊名: APPLIED THERMAL ENGINEERING
出版日期: 2017
卷号: 117, 页码:682-688
关键词: Molten salt ; Laminar flow ; Transition flow ; Heat exchanger ; Heat transfer correlation
DOI: 10.1016/j.applthermaleng.2017.01.070
文章类型: 期刊论文
英文摘要: Convective heat transfer performances of molten salt for laminar and transition flow in concentric tube are experimentally investigated using molten salt as the hot fluid flowing through the inner concentric tube within the range of Reynolds number 300-10,000 and Prandtl number 11-27. Heat transfer coefficients of tube side molten salt are calculated using Wilson plots and the heat transfer characteristics are studied by comparing with the traditional correlations. The results show that the laminar flow heat transfer coefficients of molten salt are higher than that of pure forced flow due to natural convection. In the transition region, the transition point to transition flow is expedited to critical Reynolds number down to 1800-2000 due to the effect of natural convection, which might increase the mean value of Nusselt number in low-Reynolds-number transition regime up to 1.3 times than that value predicted by Modified Petukhov correlation. Finally, based on the model of Churchill and Usagi, an overall correlated equation for all Re and Pr is proposed to predict the heat transfer characteristics for laminar and transition regimes. The correlated equation shows good agreement with the experiment data and higher accuracy than prior expressions for the restricted ranges of Re and Pr. (C) 2017 Published by Elsevier Ltd.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000397690700069
ISSN号: 1359-4311
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27284
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Chen, YS,Zhu, HH,Tian, J,et al. Convective heat transfer characteristics in the laminar and transition region of molten salt in concentric tube[J]. APPLIED THERMAL ENGINEERING,2017-01-01,117:682-688.
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