螺旋缠绕波节管传热与流动性能分析

doi:10.16085/j.issn.1000-6613.2016.07.009

化工进展 ›› 2016, Vol. 35 ›› Issue (07): 1994-2000.DOI: 10.16085/j.issn.1000-6613.2016.07.009

螺旋缠绕波节管传热与流动性能分析

王定标, 邓靜, 张灿灿, 张喜迎, 董桢, 谷帆江

郑州大学化工与能源学院, 河南郑州 450001

收稿日期:2015-10-22 修回日期:2016-01-22 出版日期:2016-07-05 发布日期:2016-07-05
通讯作者: 王定标(1967-),男,教授,博士生导师,主要从事过程工程节能技术及高效装备研究等工作。E-mail:Wangdb@zzu.edu.cn。
作者简介:王定标(1967-),男,教授,博士生导师,主要从事过程工程节能技术及高效装备研究等工作。E-mail:Wangdb@zzu.edu.cn。
基金资助:
国家自然科学基金项目(21576245)。

Heat transfer and flow characteristics analyses of helical tube with corrugation

WANG Dingbiao, DENG Jing, ZHANG Cancan, ZHANG Xiying, DONG Zhen, GU Fanjiang

School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, Henan, China

Received:2015-10-22 Revised:2016-01-22 Online:2016-07-05 Published:2016-07-05

摘要/Abstract

摘要： 以水为工质,对螺旋缠绕波节管湍流状态下传热与流阻性能进行数值计算,分析了其强化换热的机理,并分析了波节深度H与波节间距P对其传热与流动阻力的影响。结果表明:相同工况下,螺旋缠绕波节管的综合换热性能优于螺旋缠绕光管;流体在管内做螺旋运动,由于离心力的作用,在垂直流体主流方向上产生二次流;管横截面周期性的扩张与收缩,使流体在波节内产生沿流体主流方向上的回流,它们对流体边界层产生很强的破坏作用,使湍流程度增强,对换热有较好的强化作用;随着波节深度H的增大,Nu提高,f增大,综合传热性能逐渐提高;随着波节间距P的减小,Nu提高,f降低,综合传热性能逐渐提高。

关键词: 螺旋缠绕波节管, 强化换热, 波节深度, 波节间距

Abstract: Using water as the working fluid, the turbulent heat transfer and flow characteristic of helical tube with corrugation were numerically investigated. The heat transfer enhancement mechanism was analyzed, and the effects of corrugation height H and corrugation pitch P on heat transfer and flow characteristics were discussed. The simulation results indicated that the overall heat transfer performance of helical tube with corrugation was better than that of smooth helical tube in the same working condition, and that the centrifugal force coursed by the helical movement of fluid led to secondary flow in the vertical flow direction. Meanwhile, the back flow in main flowing direction was resulted from the periodic expansion and contraction of tube cross section, which destroyed the flow boundary layer, enlarged the turbulence intensity and strengthened the heat transfer process greatly. With increasing H, Nu and f the overall heat transfer performance increased. With decreasing P, Nu increased, f decreased and the overall heat transfer performance were improved greatly .

Key words: helical tube with corrugation, heat transfer enhancement, corrugation height, corrugation pitch

中图分类号:

TQ051.5

王定标, 邓靜, 张灿灿, 张喜迎, 董桢, 谷帆江. 螺旋缠绕波节管传热与流动性能分析[J]. 化工进展, 2016, 35(07): 1994-2000.

WANG Dingbiao, DENG Jing, ZHANG Cancan, ZHANG Xiying, DONG Zhen, GU Fanjiang. Heat transfer and flow characteristics analyses of helical tube with corrugation[J]. Chemical Industry and Engineering Progree, 2016, 35(07): 1994-2000.

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螺旋缠绕波节管传热与流动性能分析

Heat transfer and flow characteristics analyses of helical tube with corrugation

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