3D Numerical Study on Compound Heat Transfer Enhancement of Converging-diverging Tubes Equipped with Twin Twisted Tapes

Abstract

Abstract: The paper presents a 3D numerical simulation of turbulent heat transfer and flow characteristics in converging-diverging tubes(CDs) and converging-diverging tubes equipped with twin counter-swirling twisted tapes(CDTs).The effects of Reynolds number(Re=10000-20000),pitch length(P=11.25,22.5 mm),rib height(e=0.5,0.8,1.1 mm),pitch ratio(δ=1:8,5:4,8:1),gap distance between twin twisted tapes(b=0.5,4.5,8.5 mm) and tape number(n=2,3,4,5,6) on Nusselt number(Nu),friction factor(f) and thermal enhancement factor(η) are investigated under uniform heat flux conditions,using water as working fluid.In order to illustrate the heat transfer and fluid flow mechanisms,flow structures in CDs and CDTs are presented.The obtained results reveal that all geometric parameters have important effects on the thermal performance of CD and CDT,and both CD and CDT show better thermal performance than plain tube at the constant pumping power.It is also found that the increases in the Nusselt number and friction factor for CDT are,respectively,up to 6.3%-35.7% and 1.75-5.3 times of the corresponding bare CD.All CDTs have good thermal performance with η greater than 1 which indicates that the compound heat transfer technique of CDT is commendable for the maximum enhanced heat transfer rate.

Key words: heat transfer enhancement, converging-diverging tube, twisted tape, numerical simulation

摘要： The paper presents a 3D numerical simulation of turbulent heat transfer and flow characteristics in converging-diverging tubes(CDs) and converging-diverging tubes equipped with twin counter-swirling twisted tapes(CDTs).The effects of Reynolds number(Re=10000-20000),pitch length(P=11.25,22.5 mm),rib height(e=0.5,0.8,1.1 mm),pitch ratio(δ=1:8,5:4,8:1),gap distance between twin twisted tapes(b=0.5,4.5,8.5 mm) and tape number(n=2,3,4,5,6) on Nusselt number(Nu),friction factor(f) and thermal enhancement factor(η) are investigated under uniform heat flux conditions,using water as working fluid.In order to illustrate the heat transfer and fluid flow mechanisms,flow structures in CDs and CDTs are presented.The obtained results reveal that all geometric parameters have important effects on the thermal performance of CD and CDT,and both CD and CDT show better thermal performance than plain tube at the constant pumping power.It is also found that the increases in the Nusselt number and friction factor for CDT are,respectively,up to 6.3%-35.7% and 1.75-5.3 times of the corresponding bare CD.All CDTs have good thermal performance with η greater than 1 which indicates that the compound heat transfer technique of CDT is commendable for the maximum enhanced heat transfer rate.

关键词: heat transfer enhancement, converging-diverging tube, twisted tape, numerical simulation

HONG Yuxiang, DENG Xianhe, ZHANG Lianshan. 3D Numerical Study on Compound Heat Transfer Enhancement of Converging-diverging Tubes Equipped with Twin Twisted Tapes[J]. , 2012, 20(3): 589-601.

洪宇翔, 邓先和, 张连山. 3D Numerical Study on Compound Heat Transfer Enhancement of Converging-diverging Tubes Equipped with Twin Twisted Tapes[J]. , 2012, 20(3): 589-601.

References

1 Bergles, A.E., "ExHFT for fourth generation heat transfer technology", Exp. Therm. Fluid Sci., 26 (2-4), 335-344 (2002).
2 Li, J., "Study on heat transfer performance and flow resistance performance of many kinds of heat transfer enhanced tube", Master Thesis, South China University of Technology, Guangzhou (2000). (in Chinese)
3 Chen, Y., Deng, X.H., Ding, X.J., Wang, Y.J., "Convection heat transfer of fully developed turbulent flow in shaped tubes with a new concept", Int. Commun. Heat Mass Transfer, 31 (3), 355-364 (2004).
4 Manglik, R.M., Bergles, A.E., "Heat transfer and pressure drop correlations for twisted-tape inserts in isothermal tubes: part I-Laminar flows", J. Heat Transfer, 115 (4), 881-889 (1993).
5 Manglik, R.M., Bergles, A.E., "Heat transfer and pressure drop correlations for twisted-tape inserts in isothermal tubes: part Ⅱ-Transition and turbulent flows", J. Heat Transfer, 115 (4), 890-897 (1993).
6 Saha, S.K., Gaitonde, U.N., Date, A.W., "Heat transfer and pressure drop characteristics of laminar flow in a circular tube fitted with regularly spaced twisted-tape elements", Exp. Therm. Fluid Sci., 2 (3), 310-322 (1989).
7 Saha, S.K., Gaitonde, U.N., Date, A.W., "Heat transfer and pressure drop characteristics of turbulent flow in a circular tube fitted with regularly spaced twisted-tape elements", Exp. Therm. Fluid Sci., 3 (6), 632-640 (1990).
8 Abu-Khader, M.M., "Further understanding of twisted tape effects as tube insert for heat transfer enhancement", Heat Mass Transfer, 43 (2), 123-134 (2006).
9 Wang, Y.J., Hou, M.L., Deng, X.H., Li, L., Huang, C., Huang, H.Y., Zhang, G.F., Chen, C.H., Huang, W.J., "Configuration optimization of regularly spaced short-length twisted tape in a circular tube to enhance turbulent heat transfer using CFD modeling", Appl. Therm. Eng., 31 (6-7), 1141-1149 (2011).
10 Eiamsa-ard, S., Thianpong, C., Eiamsa-ard, P., "Turbulent heat transfer enhancement by counter/co-swirling flow in a tube fitted with twin twisted tapes", Exp. Therm. Fluid Sci., 34 (1), 53-62 (2010).
11 Eiamsa-ard, S., Promvonge, P., "Thermal characteristics in round tube fitted with serrated twisted tape", Appl. Therm. Eng., 30 (13), 1673-1682 (2010).
12 Chang, S.W., Yang, T.L., Liou, J.S., "Heat transfer and pressure drop in tube with broken twisted tape insert", Exp. Therm. Fluid Sci., 32 (2), 489-501 (2007).
13 Guo, J., Fan, A.W., Zhang, X.Y., Liu, W., "A numerical study on heat transfer and friction factor characteristics of laminar flow in a circular tube fitted with center-cleared twisted tape", Int. J. Therm. Sci., 50 (7), 1263-1270 (2011).
14 Murugesan, P., Mayilsamy, K., Suresh, S., "Turbulent heat transfer and pressure drop in tube fitted with square-cut twisted tape", Chin. J. Chem. Eng., 18 (4), 609-617 (2010).
15 Zimparov, V., "Enhancement of heat transfer by a combination of three-start spirally corrugated tubes with a twisted tape", Int. J. Heat Mass Transfer, 44 (3), 551-574 (2001).
16 Zimparov, V., "Enhancement of heat transfer by a combination of a single-start spirally corrugated tubes with a twisted tape", Exp. Therm. Fluid Sci., 25 (7), 535-546 (2002).
17 Nagarajan, P.K., Mukkamala, Y., Sivashanmugam, P., "Studies on heat transfer and friction factor characteristics of turbulent flow through a micro-finned tube fitted with left-right inserts", Appl. Therm. Eng., 30 (13), 1666-1672 (2010).
18 Promvonge, P., "Thermal augmentation in circular tube with twisted tape and wire coil turbulators", Energy Convers. Manage., 49 (11), 2949-2955 (2008).
19 Eiamsa-ard, S., Nivesrangsan, P., Chokphoemphun, S., Promvonge, P., "Influence of combined non-uniform wire coil and twisted tape inserts on thermal performance characteristics", Int. Commun. Heat Mass Transfer, 37 (7), 850-856 (2010).
20 Bharadwaj, P., Khondge, A.D., Date, A.W., "Heat transfer and pressure drop in a spirally grooved tube with twisted tape insert", Int. J. Heat Mass Transfer, 52 (7-8), 1938-1944 (2009).
21 Webb, R.L., Eckert, E.R.G., "Application of rough surfaces to heat exchanger design", Int. J. Heat Mass Transfer, 15 (9), 1647-1658 (1972).
22 Yakhot, V., Orszag, S.A., "Renormalised group analysis of turbulence: I. Basic theory", J. Sci. Comput., 1 (1), 3-51 (1986).
23 Incropera, F.P., Witt, P.D., Bergman, T.L., Lavine, A.S., Fundamentals of Heat and Mass Transfer, 6th edition, John-Wiley & Sons, Hoboken (2006).
24 Durst, F., Fluid Mechanics, Springer, Berlin (2008).

[1]	Jiahao Xing, Huaizhi Han, Ruitian Yu, Wen Luo. Numerical simulation of flow and heat transfer of n-decane in sub-millimeter spiral tube at supercritical pressure [J]. Chinese Journal of Chemical Engineering, 2023, 60(8): 173-185.
[2]	Jian Han, Xinhua Liu, Shanwei Hu, Nan Zhang, Jingjing Wang, Bin Liang. Optimization of decoupling combustion characteristics of coal briquettes and biomass pellets in household stoves [J]. Chinese Journal of Chemical Engineering, 2023, 59(7): 182-192.
[3]	Shengfeng Luo, Song Zhang, Yiping Zeng, Hui Zhang, Lili Zheng, Zhaopeng Xu. Study on oxygen transport and titanium oxidation in coating cracks under parallel gas flow based on LBM modelling [J]. Chinese Journal of Chemical Engineering, 2023, 56(4): 15-24.
[4]	Jikai Dong, Bing Wang, Xinjie Wang, Chenxi Cao, Shikuan Chen, Wenli Du. Optimization of sensor deployment sequences for hazardous gas leakage monitoring and source term estimation [J]. Chinese Journal of Chemical Engineering, 2023, 56(4): 169-179.
[5]	Shuangfei Zhao, Yingying Nie, Wenyan Zhang, Runze Hu, Lianzhu Sheng, Wei He, Ning Zhu, Yuguang Li, Dong Ji, Kai Guo. Microfluidic field strategy for enhancement and scale up of liquid–liquid homogeneous chemical processes by optimization of 3D spiral baffle structure [J]. Chinese Journal of Chemical Engineering, 2023, 56(4): 255-265.
[6]	Xibao Zhang, Zhenghong Luo. Bubble size modeling approach for the simulation of bubble columns [J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 194-200.
[7]	Pan Zhang, Guanghui Chen, Weiwen Wang, Guodong Zhang, Huaming Wang. Analysis of the nutation and precession of the vortex core and the influence of operating parameters in a cyclone separator [J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 1-10.
[8]	Feng Jiang, Di Xu, Ruijia Li, Guopeng Qi, Xiulun Li. Particle collision behavior and heat transfer performance in a Na₂SO₄ circulating fluidized bed evaporator [J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 40-52.
[9]	Ye Zhang, Yong Gao, Peng Wang, Duo Na, Zhenming Yang, Jinsong Zhang. Solvent extraction with a three-dimensional reticulated hollow-strut SiC foam microchannel reactor [J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 53-62.
[10]	Mehdi Miansari, Mehdi Rajabtabar Darvishi, Davood Toghraie, Pouya Barnoon, Mojtaba Shirzad, As'ad Alizadeh. Numerical investigation of grooves effects on the thermal performance of helically grooved shell and coil tube heat exchanger [J]. Chinese Journal of Chemical Engineering, 2022, 44(4): 424-434.
[11]	Shuai Chen, Jiahong Lan, Yu Zhang, Jia Guo, Zhikai Cao, Yong Sha. 3D multiphase flow simulation of Marangoni convection on reactive absorption of CO₂ by monoethanolamine in microchannel [J]. Chinese Journal of Chemical Engineering, 2022, 43(3): 370-377.
[12]	Jian Chen, Lingbing Bu, Yingqi Luo. Comparative study on pressure swing adsorption system for industrial hydrogen and fuel cell hydrogen [J]. Chinese Journal of Chemical Engineering, 2022, 42(2): 112-119.
[13]	Jing Zhang, Zhongyi Ge, Wei Wang, Bin Gong, Yaxia Li, Jianhua Wu. The concave-wall jet characteristics in vertical cylinder separator with inlet baffle component [J]. Chinese Journal of Chemical Engineering, 2022, 42(2): 178-189.
[14]	Liwang Wang, Erwen Chen, Liang Ma, Zhanghuang Yang, Zongzhe Li, Weihui Yang, Hualin Wang, Yulong Chang. Numerical simulation and experimental study of gas cyclone–liquid jet separator for fine particle separation [J]. Chinese Journal of Chemical Engineering, 2022, 51(11): 43-52.
[15]	Jie Ju, Xianjian Duan, Bismark Sarkodie, Yanjie Hu, Hao Jiang, Chunzhong Li. Numerical simulation of flow field and residence time of nanoparticles in a 1000-ton industrial multi-jet combustion reactor [J]. Chinese Journal of Chemical Engineering, 2022, 51(11): 86-99.