Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator

doi:10.1016/S1004-9541(14)60030-6

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (1): 1-10.DOI: 10.1016/S1004-9541(14)60030-6

• 流体力学与传递现象 • 下一篇

Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator

Sompol Skullong¹, Pongjet Promvonge²

1 Department of Mechanical Engineering, Faculty of Engineering at Si Racha, Kasetsart University Si Racha Campus, Tungsukla, Si Racha, Chonburi 20230, Thailand;
2 Department of Mechanical Engineering, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand

收稿日期:2013-03-03 修回日期:2013-09-30 出版日期:2014-01-05 发布日期:2014-01-04
通讯作者: Sompol Skullong
基金资助:
Supported by the Thailand Research Fund (TRF).

Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator

Sompol Skullong¹, Pongjet Promvonge²

1 Department of Mechanical Engineering, Faculty of Engineering at Si Racha, Kasetsart University Si Racha Campus, Tungsukla, Si Racha, Chonburi 20230, Thailand;
2 Department of Mechanical Engineering, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand

Received:2013-03-03 Revised:2013-09-30 Online:2014-01-05 Published:2014-01-04
Contact: Sompol Skullong
Supported by:
Supported by the Thailand Research Fund (TRF).

摘要/Abstract

摘要： The paper presents an experimental study on the heat transfer and flow friction characteristics in a solar air heater channel fitted with delta-winglet type vortex generators (DWs). The experiments are conducted by varying the airflow rate for Reynolds number in the range of 5000 to 24000 in the test section with a uniform heat-flux applied on the upper channel wall. Firstly, the DW pairs are mounted only at the entrance of the lower wall of the test channel (called DW-E) to create multiple vortex flows at the entry. The effect of two transverse pitches (R_P=P_t/H=1 and 2) at three attack angles (α=30°, 45° and 60°) of the DW-E with its relative height, b/H=0.5 (half height of channel) is examined. Secondly, the 30° DWs with three different relative heights (b/H 0.3, 0.4 and 0.5) are placed on the upper wall only (absorber plate, called DW-A) of the test channel. The experimental result reveals that in the first case, the 60° DW-E at R_P=1 provides the highest heat transfer and friction factor while the 30° DW-E at R_P=1 performs overall better than the others. In the second case, the 30° DW-A at b/H=0.5 yields the highest heat transfer and friction factor but the best thermal performance is found at b/H=0.4.

关键词: heat transfer intensification, delta-winglet, Reynolds number, friction factor, solar air heater, flat channel

Abstract: The paper presents an experimental study on the heat transfer and flow friction characteristics in a solar air heater channel fitted with delta-winglet type vortex generators (DWs). The experiments are conducted by varying the airflow rate for Reynolds number in the range of 5000 to 24000 in the test section with a uniform heat-flux applied on the upper channel wall. Firstly, the DW pairs are mounted only at the entrance of the lower wall of the test channel (called DW-E) to create multiple vortex flows at the entry. The effect of two transverse pitches (R_P=P_t/H=1 and 2) at three attack angles (α=30°, 45° and 60°) of the DW-E with its relative height, b/H=0.5 (half height of channel) is examined. Secondly, the 30° DWs with three different relative heights (b/H 0.3, 0.4 and 0.5) are placed on the upper wall only (absorber plate, called DW-A) of the test channel. The experimental result reveals that in the first case, the 60° DW-E at R_P=1 provides the highest heat transfer and friction factor while the 30° DW-E at R_P=1 performs overall better than the others. In the second case, the 30° DW-A at b/H=0.5 yields the highest heat transfer and friction factor but the best thermal performance is found at b/H=0.4.

Key words: heat transfer intensification, delta-winglet, Reynolds number, friction factor, solar air heater, flat channel

Sompol Skullong, Pongjet Promvonge. Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator[J]. Chinese Journal of Chemical Engineering, 2014, 22(1): 1-10.

Sompol Skullong, Pongjet Promvonge. Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator[J]. Chin.J.Chem.Eng., 2014, 22(1): 1-10.

参考文献

1 Promvonge, P., "Thermal augmentation in circular tube with twisted tape and wire coil turbulators", Energy Convers. Manag., 49, 2949-2955 (2008).
2 Promvonge, P., "Thermal performance in circular tube fitted with coiled square wires", Energy Convers. Manag., 49 (5), 980-987 (2008).
3 Thianpong, C., Chompookham, T., Skullong, S., Promvonge, P., "Thermal characterization of turbulent flow in a channel with isosceles triangular ribs", Int. Commun. Heat Mass Transfer, 36, 712-717 (2009).
4 Sripattanapipat, S., Promvonge, P., "Numerical analysis of laminar heat transfer in a channel with diamond-shaped baffles", Int. Commun. Heat Mass Transfer, 36 (1), 32-38 (2009).
5 Promvonge, P., Chompookham, T., Kwankaomeng, S., Thianpong, C., "Enhanced heat transfer in a triangular ribbed channel with longitudinal vortex generators", Energy Convers. Manag., 51 (6), 1242-1249 (2010).
6 Chompookham, T., Thianpong, C., Kwankaomeng, S., Promvonge, P., "Heat transfer augmentation in a wedge-ribbed channel using winglet vortex generators", Int. Commun. Heat Mass Transfer, 37, 163-169 (2010).
7 Promvonge, P., Khanoknaiyakarn, C., Kwankaomeng, S., Thianpong, C., "Thermal behavior in solar air heater channel fitted with combined rib and delta-winglet", Int. Commun. Heat Mass Transfer, 38, 749-756 (2011).
8 Sahu, M.M., Bhagoria, J.L., "Augmentation of heat transfer coefficient by using 90° broken transverse ribs on absorber plate of solar air heater", Renew. Energy, 30 (13), 2057-2063 (2005).
9 Mittal, M.K., Varun, Saini, R.P., Singal, S.K., "Effective efficiency of solar air heaters having different types of roughness elements on absorber plate", Energy, 32, 739-745 (2007).
10 Aharwal, K.R., Gandhi, B.K., Saini, J.S., "Experimental investigation on heattransfer enhancement due to a gap in an inclined continuous rib arrangement in a rectangular duct of solar air heater", Renew. Energy, 33, 585-596 (2008).
11 Varun, Saini, R.P., Singal, S.K., "Investigation of thermal performance of solar air heater having roughness elements as a combination of inclined and transverse ribs on the absorber plate", Renew. Energy, 33 (6), 1398-1405 (2008).
12 Momin, A.M.E., Saini, J.S., Solanki, S.C., "Heat transfer and friction in solar air heater duct with V-shaped rib roughness on absorber plate", Int. J. Heat Mass Transfer, 45, 3383-3396 (2002).
13 Chandra, P.R., Alexander, C.R., Han, J.C., "Heat transfer and friction behaviour in rectangular channels with varying number of ribbed walls", Int. J. Heat Mass Transfer, 46, 481-495 (2003).
14 Tanda, G., "Heat transfer in rectangular channels with transverse and V-shaped broken ribs", Int. J. Heat Mass Transfer, 47, 229-243 (2004).
15 Chang, S.W., Liou, T.M., Lu, M.H., "Heat transfer of rectangular narrow channel with two opposite scale roughened walls", Int. J. Heat Mass Transfer, 48, 3921-3931 (2005).
16 Katoh, K., Choi, K., Azuma, T., "Heat transfer enhancement and pressure loss by surface roughness in turbulent channel flows", Int. J. Heat Mass Transfer, 43, 4009-4017 (2000).
17 Varun, Saini, R.P., Singal, S.K., "A review on roughness geometry used in solar air heaters", Solar Energy, 81, 1340-1350 (2007).
18 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, 609-617 (2010).
19 Murugesan, P., Mayilsamy, K., Suresh, S., "Heat transfer and friction factor studies in a circular tube fitted with twisted tape consisting of wire-nails", Chin. J. Chem. Eng., 18, 1038-1042 (2010).
20 Gunes, S., Ozceyhan, V., Buyukalaca, O., "Heat transfer enhancement in a tube with equilateral triangle cross sectioned coiled wire inserts", Exp. Therm. Fluid Sci., 34 (6), 684-691 (2010).
21 Promvonge, P., Skullong, S., Kwankaomeng, S., Thiangpong, C., "Heat transfer in square duct fitted diagonally with angle-finned tape-Part 1: Experimental study", Int. Commun. Heat Mass Transfer, 39 (5), 617-624 (2012).
22 Promvonge, P., Skullong, S., Kwankaomeng, S., Thiangpong, C., "Heat transfer in square duct fitted diagonally with angle-finned tape-Part 2: Numerical study", Int. Commun. Heat Mass Transfer, 39 (5), 625-633 (2012).
23 Eiamsa-ard, S., Koolnapadol, N., Promvonge, P., "Heat transfer behavior in a square duct with tandem wire coil element insert", Chin. J. Chem. Eng., 20 (5), 863-869 (2012).
24 Gentry, M.C., Jacobi, A.M. "Heat transfer enhancement by delta-wing vortex generators on a flat plate: Vortex interactions with the boundary layer", Exp. Therm. Fluid Sci., 14 (3), 231-242 (1997).
25 Kwak, K.M., Torii, K., Nishino, K., "Simultaneous heat transfer enhancement and pressure loss reduction for finned-tube bundles with the first or two transverse rows of built-in winglets", Exp. Therm. Fluid Sci., 29 (5), 625-632 (2005).
26 Jacobi, A.M., Shah, R.K., "Heat transfer surface enhancement through the use of longitudinal vortices: A review of recent progress", Exp. Therm. Fluid Sci., 11 (3), 295-309 (1995).
27 Fiebig, M., "Embedded vortices in internal flow: Heat transfer and pressure loss enhancement", Int. J. Heat Fluid Flow, 16 (5), 376-388 (1995).
28 Tian, L.T., He, Y.L., Lei, Y.G., Tao, W.Q., "Numerical study of fluid flow and heat transfer in a flat-plate channel with longitudinal vortex generators by applying field synergy principle analysis", Int. Commun. Heat Mass Transfer, 36 (2), 111-120 (2009).
29 ANSI/ASME, "Measurement uncertainty", PTC 19. 1-1985, Part I, USA (1986).
30 Incropera, F., Dewitt, P.D., Fundamentals of Heat and Mass Transfer, 6th edition, John Wiley & Sons, USA (2007).

[1]	Tao Sun, Mingjun Pang, Yang Fei. Numerical study on hydrodynamic characteristics of spherical bubble contaminated by surfactants under higher Reynolds numbers[J]. 中国化学工程学报, 2022, 45(5): 268-283.
[2]	Chuanshuai Dong, Lin Lu, Tao Wen, Shaojie Zhang. Thermal performance assessment of self-rotating twisted tapes and Al₂O₃ nanoparticle in a circular pipe[J]. 中国化学工程学报, 2021, 32(4): 77-86.
[3]	Huanpeng Liu, Shaowei Wang, Chenyu Yang, Taiping Chen. Numerical study on the hydrodynamics of agglomerates at intermediate Reynolds numbers[J]. 中国化学工程学报, 2020, 28(6): 1533-1541.
[4]	Sajad Mir, Omid Ali Akbari, Davood Toghraie, Ghanbarali Sheikhzadeh, Ali Marzban, Saeid Mir, Pouyan Talebizadehsardari. A comprehensive study of two-phase flow and heat transfer of water/Ag nanofluid in an elliptical curved minichannel[J]. 中国化学工程学报, 2020, 28(2): 383-402.
[5]	Krunal M. Gangawane, B. Manikandan. Mixed convection characteristics in lid-driven cavity containing heated triangular block[J]. , 2017, 25(10): 1381-1394.
[6]	Weiguo Xu, Guodong Liu, Qinghong Zhang, Shuai Wang, Huilin Lu, Heping Tan. Heat transfer and friction factor of Therminol liquid phase heat transfer fluid in a ribbed tube[J]. , 2017, 25(10): 1343-1351.
[7]	Krunal M. Gangawane, B. Manikandan. Mixed convection characteristics in lid-driven cavity containing heated triangular block[J]. , 2017, 25(10): 1381-1394.
[8]	Weiguo Xu, Guodong Liu, Qinghong Zhang, Shuai Wang, Huilin Lu, Heping Tan. Heat transfer and friction factor of Therminol liquid phase heat transfer fluid in a ribbed tube[J]. , 2017, 25(10): 1343-1351.
[9]	Zhijia Yu, Xinghua Liu, Guozhu Kuang. Water slip flow in superhydrophobic microtubes within laminar flow region[J]. Chinese Journal of Chemical Engineering, 2015, 23(5): 763-768.
[10]	Suriya Chokphoemphun, Monsak Pimsarn, Chinaruk Thianpong, Pongjet Promvonge. Thermal performance of tubular heat exchanger with multiple twisted-tape inserts[J]. Chinese Journal of Chemical Engineering, 2015, 23(5): 755-762.
[11]	Suriya Chokphoemphun, Monsak Pimsarn, Chinaruk Thianpong, Pongjet Promvonge. Heat transfer augmentation in a circular tube with winglet vortex generators[J]. Chinese Journal of Chemical Engineering, 2015, 23(4): 605-614.
[12]	Watcharin Noothong, Supattarachai Suwannapan, Chinaruk Thianpong, Pongjet Promvonge. Enhanced heat transfer in a heat exchanger square-duct with discrete V-finned tape inserts[J]. , 2015, 23(3): 490-498.
[13]	韩崇刚, 杨卫民, 丁玉梅, 关昌峰, 李锋祥, 张震, 阎华. Experimental Study of Heat Transfer Enhancement and Friction Loss Induced by Inserted Rotor-assembled Strand (II) Lubricant Oil 22[J]. , 2011, 19(6): 1069-1074.
[14]	P. Murugesan, K. Mayilsamy, S. Suresh. Heat Transfer and Friction Factor Studies in a Circular Tube Fitted with Twisted Tape Consisting of Wire-nails[J]. , 2010, 18(6): 1038-1042.
[15]	P. Murugesan, K. Mayilsamy, S. Suresh. Turbulent Heat Transfer and Pressure Drop in Tube Fitted with Square-cut Twisted Tape[J]. , 2010, 18(4): 609-617.

Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator

Experimental Investigation on Turbulent Convection in Solar Air Heater Channel Fitted with Delta Winglet Vortex Generator

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价