新型六分扇形螺旋折流板换热器壳程传热及流动特性

doi:10.3969/j.issn.0438-1157.2013.09.007

化工学报 ›› 2013, Vol. 64 ›› Issue (9): 3123-3129.DOI: 10.3969/j.issn.0438-1157.2013.09.007

新型六分扇形螺旋折流板换热器壳程传热及流动特性

杜文静, 王红福, 曹兴, 程林

山东大学热科学与工程研究中心, 山东济南 250061

收稿日期:2013-02-22 修回日期:2013-03-13 出版日期:2013-09-05 发布日期:2013-09-05
通讯作者: 程林
作者简介:杜文静(1977- ),女,副教授。
基金资助:
国家自然科学基金项目(51106090);济南市高校院所自主创新项目(201202089)。

Heat transfer and fluid flow on shell-side of heat exchangers with novel sextant sector helical baffles

DU Wenjing, WANG Hongfu, CAO Xing, CHENG Lin

Center of Thermal Science and Technology, Shandong University, Jinan 250061, Shandong, China

Received:2013-02-22 Revised:2013-03-13 Online:2013-09-05 Published:2013-09-05
Supported by:
supported by the National Natural Science Foundation of China(51106090).

摘要/Abstract

摘要： 针对现有四分螺旋折流板换热器中心区域漏流明显的特征,提出了一种新型的六分扇形螺旋折流板换热器。建立了六分扇形螺旋折流板换热器的三维物理模型,应用Ansys CFX软件对其壳程流动与传热特性进行数值模拟,分析了不同螺旋角(10°、20°、30°、40°)和不同工况下六分扇形螺旋折流板换热器的壳侧性能,并与传统的弓形折流板换热器作对比。结果表明,六分扇形螺旋折流板可以显著减少三角区漏流现象的发生,壳程流体旋流特性较好。随着螺旋角的增大,壳侧速度场与温度场分布更加均匀,综合换热性能逐步提高。

关键词: 换热器, 螺旋折流板, 六分折流板, 弓形折流板

Abstract: Faced with the obvious leakage flow phenomena in the heat exchanger with quarter helical baffles,a novel sextant helical baffled heat exchanger was put forward in this paper.The 3-dimensional physical model of sextant helical baffled heat exchanger was built;numerical simulation was performed with different helical angles(10°,20°,30°,40°)under different working conditions.ANSYS CFX software was used to obtain detailed fluid flow and heat transfer characteristics on the shell-side,and comparison was made between the new and the traditional segmental baffled heat exchangers.Results indicate that the leakage flow is significantly reduced with the sextant helical baffles,and shell-side rotational flow characteristics are also improved.As the helical angle increases,the velocity field and the temperature field become much uniform,so the comprehensive heat transfer performance is improved.

Key words: heat exchanger, helical baffle, sextant baffle, segmental baffle

中图分类号:

TK124

杜文静, 王红福, 曹兴, 程林. 新型六分扇形螺旋折流板换热器壳程传热及流动特性[J]. 化工学报, 2013, 64(9): 3123-3129.

DU Wenjing, WANG Hongfu, CAO Xing, CHENG Lin. Heat transfer and fluid flow on shell-side of heat exchangers with novel sextant sector helical baffles[J]. CIESC Journal, 2013, 64(9): 3123-3129.

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新型六分扇形螺旋折流板换热器壳程传热及流动特性

Heat transfer and fluid flow on shell-side of heat exchangers with novel sextant sector helical baffles

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