Natural convection heat transfer of molten nitrate around horizontal cylinder

doi:10.11949/j.issn.0438-1157.20141512

CIESC Journal ›› 2015, Vol. 66 ›› Issue (3): 949-954.DOI: 10.11949/j.issn.0438-1157.20141512

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Natural convection heat transfer of molten nitrate around horizontal cylinder

LU Yuanwei, LI Xiaoli, DU Wenbin, SUN Xiaoli, WU Yuting, MA Chongfang

Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

Received:2014-10-18 Revised:2014-11-15 Online:2015-03-05 Published:2015-03-05
Supported by:
supported by the National Basic Research Program of China (2011CB707202), the Natural Science Foundation of Beijing (3132012), the National High Technology Research and Development Program of China (2013AA050502) and the National Natural Science Foundation of Major International Cooperation and Exchange Programs of China (51361135702).

水平圆柱表面熔融硝酸盐自然对流传热规律

鹿院卫, 李小丽, 杜文彬, 孙晓丽, 吴玉庭, 马重芳

北京工业大学环境与能源工程学院, 传热强化与过程节能教育部重点实验室, 北京 100124

通讯作者: 鹿院卫
基金资助:
国家重点基础研究发展计划项目(2011CB707202);北京市自然科学基金项目(3132012);国家高技术研究发展计划项目(2013AA050502);国家自然科学基金重大国际合作与交流项目(51361135702)。

Abstract

Abstract:

In order to understand natural convection heat transfer of molten nitrate, natural convection heat transfer of lithium nitrate (LiNO₃) and multi-components nitrate around a horizontal cylinder with different diameters (0.1, 0.4, 1, 4, 10, 40 mm) at different medium temperatures (573, 623, 673 K) was studied by simulation. The results fitted best with the Fand's correlation comparing with different classic correlations. After analysis of all calculated data, a simple correlation was proposed for predicting laminar natural convection heat transfer of molten nitrate around a horizontal cylinder. Compared with the natural convection experiment data of LiNO₃, the proposed correlation had a maximum uncertainty of ±20%, and the reliability of the proposed correlation was verified.

Key words: convection, laminar flow, numerical simulation, horizontal cylinder

摘要：

为了得到熔融硝酸盐的自然对流传热规律,对单一硝酸盐和三元混合硝酸盐分别采用6种不同直径(0.1、0.4、1、4、10、40 mm)水平圆柱体及3种不同介质温度(573、623、673 K)进行数值计算,与各经典关联式进行对比发现计算结果与Fand关联式的预测值最接近。对计算结果拟合得到水平圆柱表面熔融硝酸盐层流自然对流传热简单预测关联式,并与熔融LiNO₃自然对流实验结果进行对比,发现实验结果在拟合关联式预测值的±20%范围内,验证了拟合关联式的可靠性。

关键词: 对流, 层流, 数值模拟, 水平圆柱

CLC Number:

TK124

LU Yuanwei, LI Xiaoli, DU Wenbin, SUN Xiaoli, WU Yuting, MA Chongfang. Natural convection heat transfer of molten nitrate around horizontal cylinder[J]. CIESC Journal, 2015, 66(3): 949-954.

鹿院卫, 李小丽, 杜文彬, 孙晓丽, 吴玉庭, 马重芳. 水平圆柱表面熔融硝酸盐自然对流传热规律[J]. 化工学报, 2015, 66(3): 949-954.

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Natural convection heat transfer of molten nitrate around horizontal cylinder

水平圆柱表面熔融硝酸盐自然对流传热规律

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