纵向涡强化圆管内换热的数值模拟及性能分析

doi:10.11949/0438-1157.20201563

摘要/Abstract

摘要：

对布置有涡发生器小翼对的圆管内部湍流流动和强化传热特性进行了三维数值模拟。研究了涡发生器的形状和对数对流动传热特性的影响并采用综合性能指标进行优化。结果表明：涡发生器后横截面上产生的多纵向涡结构使管内流体混合更加充分，促进了壁面边界层与主流的动量和能量交换，提高了传热强度。每排4对矩形小翼时的换热性能最好，Nusselt数比光管平均提高了27.2%。相同形状下，每排4对涡发生器的综合性能均高于每排3对；相同对数下，梯形小翼的综合性能最好，三角形小翼次之，矩形小翼最差。每排4对梯形小翼时的整体综合性能最优，性能评价标准达到了0.97～1.07。

关键词: 传热, 流动, 湍流, 涡发生器, 纵向涡

Abstract:

Various technologies on heat transfer enhancement have been exploited to develop more efficient compact heat exchanging devices. In this research, turbulent heat transfer and flow characteristics in a circular tube, with longitudinal vortex generators (LVG) on the wall, were numerically investigated. The effects of LVG shapes and number of pairs on Nusselt number, friction factor and performance evaluation criteria were numerically studied. The results showed that pairs of longitudinal vortexes were generated behind the LVG, which enhanced the fluid mixing in the tube, and promoted the momentum and energy exchange between the wall boundary layer and the main flow. Further analysis indicated that the tube with 4 pairs of rectangular winglets on each row held the best heat transfer performance, and the Nusselt number was improved by 27.2% compared with smooth tube on average. The tube with 4 pairs of trapezoidal winglets on each row presented the best performance evaluation criteria, and the value reached 0.97 — 1.07.

Key words: heat transfer, flow, turbulent flow, vortex generator, longitudinal vortex

中图分类号:

TK 124

李凡, 陆高锋, 马光柏, 翟晓强, 杨顺法. 纵向涡强化圆管内换热的数值模拟及性能分析[J]. 化工学报, 2021, 72(S1): 120-126.

LI Fan, LU Gaofeng, MA Guangbai, ZHAI Xiaoqiang, YANG Shunfa. Numerical simulation and performance analysis of heat transfer enhancement in tube by longitudinal vortex[J]. CIESC Journal, 2021, 72(S1): 120-126.

图/表 7

图1 LVG在圆管壁面上布置

Fig.1 Schematic diagram of tube with LVG on wall

图2 不同形状和对数的LVG结构

Fig.2 Schematic diagram of LVG with different shapes and pairs

图3 模型验证

Fig.3 Model verification

图4 二次流流线和速度云图

Fig.4 Secondary flow streamlines and velocity contour

图5 横截面温度云图

Fig.5 Temperature contour on cross-section

图6 壁面温度云图和局部Nusselt数云图

Fig.6 Temperature contour and local Nusselt number contour on wall

图7 LVG的形状和对数对传热与流动特性的影响

Fig.7 Effects of LVG shapes and number of pairs on heat transfer and flow characteristics

参考文献 32

1	Alam T, Kim M H. A comprehensive review on single phase heat transfer enhancement techniques in heat exchanger applications [J]. Renewable and Sustainable Energy Reviews, 2018, 81: 813-839.
2	Li H W, You R Q, Deng H W, et al. Heat transfer investigation in a rotating U-turn smooth channel with irregular cross-section [J]. International Journal of Heat and Mass Transfer, 2016, 96: 267-277.
3	Qiu L, Deng H W, Sun J N, et al. Pressure drop and heat transfer in rotating smooth square U-duct under high rotation numbers [J]. International Journal of Heat and Mass Transfer, 2013, 66: 543-552.
4	Wangnipparnto S, Tiansuwan J, Kiatsiriroat T, et al. Performance analysis of thermosyphon heat exchanger under electric field [J]. Energy Conversion and Management, 2003, 44(7): 1163-1175.
5	Tada Y, Yoshioka S, Takimoto A, et al. Heat transfer enhancement in a gas-solid suspension flow by applying electric field [J]. International Journal of Heat and Mass Transfer, 2016, 93: 778-787.
6	Li Q, Xuan Y M. Experimental investigation on heat transfer characteristics of magnetic fluid flow around a fine wire under the influence of an external magnetic field [J]. Experimental Thermal and Fluid Science, 2009, 33(4): 591-596.
7	Goharkhah M, Salarian A, Ashjaee M, et al. Convective heat transfer characteristics of magnetite nanofluid under the influence of constant and alternating magnetic field [J]. Powder Technology, 2015, 274: 258-267.
8	Jin D X, Lee Y P, Lee D Y. Effects of the pulsating flow agitation on the heat transfer in a triangular grooved channel [J]. International Journal of Heat and Mass Transfer, 2007, 50(15/16): 3062-3071.
9	Akdag U, Komur M A, Akcay S. Prediction of heat transfer on a flat plate subjected to a transversely pulsating jet using artificial neural networks [J]. Applied Thermal Engineering, 2016, 100: 412-420.
10	Liu J Z, Gao J M, Gao T Y, et al. Heat transfer characteristics in steam-cooled rectangular channels with two opposite rib-roughened walls [J]. Applied Thermal Engineering, 2013, 50(1): 104-111.
11	Deo N S, Chander S, Saini J S. Performance analysis of solar air heater duct roughened with multigap V-down ribs combined with staggered ribs [J]. Renewable Energy, 2016, 91: 484-500.
12	Thakur D S, Khan M K, Pathak M. Performance evaluation of solar air heater with novel hyperbolic rib geometry [J]. Renewable Energy, 2017, 105: 786-797.
13	Karabacak R, Yakar G. Forced convection heat transfer and pressure drop for a horizontal cylinder with vertically attached imperforate and perforated circular fins [J]. Energy Conversion and Management, 2011, 52(8/9): 2785-2793.
14	Priyam A, Chand P. Thermal and thermohydraulic performance of wavy finned absorber solar air heater [J]. Solar Energy, 2016, 130: 250-259.
15	Tamna S, Skullong S, Thianpong C, et al. Heat transfer behaviors in a solar air heater channel with multiple V-baffle vortex generators [J]. Solar Energy, 2014, 110: 720-735.
16	Sadeghi O, Mohammed H A, Bakhtiari-Nejad M, et al. Heat transfer and nanofluid flow characteristics through a circular tube fitted with helical tape inserts [J]. International Communications in Heat and Mass Transfer, 2016, 71: 234-244.
17	San J Y, Huang W C, Chen C G. Experimental investigation on heat transfer and fluid friction correlations for circular tubes with coiled-wire inserts [J]. International Communications in Heat and Mass Transfer, 2015, 65: 8-14.
18	Wongcharee K, Eiamsa-Ard S. Heat transfer enhancement by twisted tapes with alternate-axes and triangular, rectangular and trapezoidal wings [J]. Chemical Engineering and Processing: Process Intensification, 2011, 50(2): 211-219.
19	Awais M, Bhuiyan A A. Heat transfer enhancement using different types of vortex generators (VGs): a review on experimental and numerical activities [J]. Thermal Science and Engineering Progress, 2018, 5: 524-545.
20	Kotcioglu I, Caliskan S, Cansiz A, et al. Second law analysis and heat transfer in a cross-flow heat exchanger with a new winglet-type vortex generator [J]. Energy, 2010, 35(9): 3686-3695.
21	Skullong S, Promvonge P, Thianpong C, et al. Thermal performance in solar air heater channel with combined wavy-groove and perforated-delta wing vortex generators [J]. Applied Thermal Engineering, 2016, 100: 611-620.
22	Khanjian A, Habchi C, Russeil S, et al. Effect of rectangular winglet pair roll angle on the heat transfer enhancement in laminar channel flow [J]. International Journal of Thermal Sciences, 2017, 114: 1-14.
23	Akcayoglu A. Flow past confined delta-wing type vortex generators [J]. Experimental Thermal and Fluid Science, 2011, 35(1): 112-120.
24	Promvonge P, Jedsadaratanachai W, Kwankaomeng S, et al. 3D simulation of laminar flow and heat transfer in V-baffled square channel [J]. International Communications in Heat and Mass Transfer, 2012, 39(1): 85-93.
25	武俊梅, 陶文铨. 纵向涡强化换热的数值研究及场协同原理分析[J]. 西安交通大学学报, 2006, 40(7): 757-761.
	Wu J M, Tao W Q. Numerical analysis to vortex heat transfer enhancement based on field synergy principle [J]. Journal of Xi'an Jiaotong University, 2006, 40(7): 757-761.
26	Lu G F, Zhou G B. Numerical simulation on performances of plane and curved winglet - pair vortex generators in a rectangular channel and field synergy analysis [J]. International Journal of Thermal Sciences, 2016, 109: 323-333.
27	田林, 柏巍, 薛山虎, 等. 纵向涡发生器对矩形通道内流动换热的影响研究[J]. 工程热物理学报, 2013, 34(2): 324-327.
	Tian L, Bai W, Xue S H, et al. Numerical study of influence of longitudinal vortex generator on flow and heat transfer in rectangular channel [J]. Journal of Engineering Thermophysics, 2013, 34(2): 324-327.
28	Wu J M, Tao W Q. Numerical study on laminar convection heat transfer in a rectangular channel with longitudinal vortex generator(Part A): Verification of field synergy principle [J]. International Journal of Heat and Mass Transfer, 2008, 51(5/6): 1179-1191.
29	Li Y X, Wang X, Zhang J, et al. Comparison and analysis of the arrangement of delta winglet pair vortex generators in a half coiled jacket for heat transfer enhancement [J]. International Journal of Heat and Mass Transfer, 2019, 129: 287-298.
30	车翠翠, 田茂诚. 圆管内置梯形翼片的流场特性PIV试验[J]. 化工学报, 2013, 64(11): 3976-3984.
	Che C C, Tian M C. PIV experiment on flow disturbance characteristics of embedded trapezoid winglets in tube [J]. CIESC Journal, 2013, 64(11): 3976-3984.
31	Zhai C, Islam M D, Simmons R, et al. Heat transfer augmentation in a circular tube with delta winglet vortex generator pairs [J]. International Journal of Thermal Sciences, 2019, 140: 480-490.
32	Xu Y B, Islam M D, Kharoua N. Numerical study of winglets vortex generator effects on thermal performance in a circular pipe [J]. International Journal of Thermal Sciences, 2017, 112: 304-317.

[1]	晁京伟, 许嘉兴, 李廷贤. 基于无管束蒸发换热强化策略的吸附热池的供热性能研究[J]. 化工学报, 2023, 74(S1): 302-310.
[2]	程成, 段钟弟, 孙浩然, 胡海涛, 薛鸿祥. 表面微结构对析晶沉积特性影响的格子Boltzmann模拟[J]. 化工学报, 2023, 74(S1): 74-86.
[3]	宋瑞涛, 王派, 王云鹏, 李敏霞, 党超镔, 陈振国, 童欢, 周佳琦. 二氧化碳直接蒸发冰场排管内流动沸腾换热数值模拟分析[J]. 化工学报, 2023, 74(S1): 96-103.
[4]	周绍华, 詹飞龙, 丁国良, 张浩, 邵艳坡, 刘艳涛, 郜哲明. 短管节流阀内流动噪声的实验研究及降噪措施[J]. 化工学报, 2023, 74(S1): 113-121.
[5]	张双星, 刘舫辰, 张义飞, 杜文静. R-134a脉动热管相变蓄放热实验研究[J]. 化工学报, 2023, 74(S1): 165-171.
[6]	张义飞, 刘舫辰, 张双星, 杜文静. 超临界二氧化碳用印刷电路板式换热器性能分析[J]. 化工学报, 2023, 74(S1): 183-190.
[7]	陈爱强, 代艳奇, 刘悦, 刘斌, 吴翰铭. 基板温度对HFE7100液滴蒸发过程的影响研究[J]. 化工学报, 2023, 74(S1): 191-197.
[8]	刘明栖, 吴延鹏. 导光管直径和长度对传热影响的模拟分析[J]. 化工学报, 2023, 74(S1): 206-212.
[9]	王志国, 薛孟, 董芋双, 张田震, 秦晓凯, 韩强. 基于裂隙粗糙性表征方法的地热岩体热流耦合数值模拟与分析[J]. 化工学报, 2023, 74(S1): 223-234.
[10]	李艺彤, 郭航, 陈浩, 叶芳. 催化剂非均匀分布的质子交换膜燃料电池操作条件研究[J]. 化工学报, 2023, 74(9): 3831-3840.
[11]	王玉兵, 李杰, 詹宏波, 朱光亚, 张大林. R134a在菱形离散肋微小通道内的流动沸腾换热实验研究[J]. 化工学报, 2023, 74(9): 3797-3806.
[12]	齐聪, 丁子, 余杰, 汤茂清, 梁林. 基于选择吸收纳米薄膜的太阳能温差发电特性研究[J]. 化工学报, 2023, 74(9): 3921-3930.
[13]	李科, 文键, 忻碧平. 耦合蒸气冷却屏的真空多层绝热结构对液氢储罐自增压过程的影响机制研究[J]. 化工学报, 2023, 74(9): 3786-3796.
[14]	陈天华, 刘兆轩, 韩群, 张程宾, 李文明. 喷雾冷却换热强化研究进展及影响因素[J]. 化工学报, 2023, 74(8): 3149-3170.
[15]	杨越, 张丹, 郑巨淦, 涂茂萍, 杨庆忠. NaCl水溶液喷射闪蒸-掺混蒸发的实验研究[J]. 化工学报, 2023, 74(8): 3279-3291.