Vortex generator as secondary flow enhancement technique has captured the attention of many researchers recently to augment the performance of the fin-and-tube heat exchanger (FTHE). There are various vortex generator parameters that influence the thermal and hydraulic performance in the FTHE such as the geometry and arrangement. In this study, the effect of different vortex generator geometries and arrangements was investigated using numerical simulation method. There are three vortex generator geometries studied including rectangular winglet (RWVG), delta winglet (DWVG), and trapezoidal winglet (TWVG). The vortex generators were placed behind tubes either in common flow down (CFD) or common flow up (CFU) arrangement. The introduction of vortex generators behind tubes resulted in heat transfer augmentation but comes together with higher pressure drop penalty. Further analysis on the thermal performance has found that TWVG in CFU arrangement almost obtained similar thermal performance factor with respect to the baseline case at Reynolds number 500 and 600. However, the thermal performance factor for TWVG in CFU arrangement decreases as the Reynolds number further increased. For other vortex generator cases, lesser thermal performance factor was found as compared to the baseline case.

References

References
1.
Gholami
,
A.
,
Wahid
,
M. A.
, and
Mohammed
,
H. A.
,
2017
, “
Thermal–Hydraulic Performance of Fin-and-Oval Tube Compact Heat Exchangers With Innovative Design of Corrugated Fin Patterns
,”
Int. J. Heat Mass Transfer
,
106
, pp.
573
592
.
2.
Shah
,
R. K.
, and
Sekulic
,
D. P.
,
2003
,
Fundamentals of Heat Exchanger Design
,
John Wiley & Sons
, Inc., Hoboken, NJ.
3.
Fiebig
,
M.
,
Valencia
,
A.
, and
Mitra
,
N. K.
,
1993
, “
Wing-Type Vortex Generators for Fin-and-Tube Heat Exchangers
,”
Exp. Therm. Fluid Sci.
,
7
(
4
), pp.
287
295
.
4.
Huisseune
,
H.
,
2011
, “
Performance Evaluation of Louvered Fin Compact Heat Exchangers With Vortex Generators
,” Ph.D. dissertation, Ghent University, Ghent, Belgium.
5.
Wang
,
C. C.
,
Lo
,
J.
,
Lin
,
Y. T.
, and
Wei
,
C. S.
,
2002
, “
Flow Visualization of Annular and Delta Winglet Vortex Generators in Fin-and-Tube Heat Exchanger Application
,”
Int. J. Heat Mass Transfer
,
45
(
18
), pp.
3803
3815
.
6.
He
,
Y. L.
,
Han
,
H.
,
Tao
,
W. Q.
, and
Zhang
,
Y. W.
,
2012
, “
Numerical Study of Heat-Transfer Enhancement by Punched Winglet-Type Vortex Generator Arrays in Fin-and-Tube Heat Exchangers
,”
Int. J. Heat Mass Transfer
,
55
(
21–22
), pp.
5449
5458
.
7.
Sayed Ahmed
,
S. A. E.
,
Mesalhy
,
O. M.
, and
Abdelatief
,
M. A.
,
2015
, “
Flow and Heat Transfer Enhancement in Tube Heat Exchangers
,”
Heat Mass Transfer
,
51
(
11
), pp.
1607
1630
.
8.
Şahin
,
B.
,
Akkoca
,
A.
,
Öztürk
,
N. A.
, and
Akilli
,
H.
,
2006
, “
Investigations of Flow Characteristics in a Plate Fin and Tube Heat Exchanger Model Composed of Single Cylinder
,”
Int. J. Heat Fluid Flow
,
27
(
3
), pp.
522
530
.
9.
Biswas
,
G.
,
Deb
,
P.
, and
Biswas
,
S.
,
1994
, “
Generation of Longitudinal Streamwise Vortices—A Device for Improving Heat Exchanger Design
,”
ASME J Heat Transfer
,
116
(
3
), pp.
588
597
.
10.
Tiggelbeck
,
S.
,
Mitra
,
N.
, and
Fiebig
,
M.
,
1992
, “
Flow Structure and Heat Transfer in a Channel With Multiple Longitudinal Vortex Generators
,”
Exp. Therm. Fluid Sci.
,
5
(
4
), pp.
425
436
.
11.
Torii
,
K.
,
Nishino
,
K.
, and
Nakayama
,
K.
,
1994
, “
Mechanism of Heat-Transfer Enhancement by Longitudinal Vortices in a Flat-Plate Boundary Layer
,”
Trans. Jpn. Soc. Mech. Eng., Part B
,
60
(
571
), pp. 997–1004.
12.
Salviano
,
L. O.
,
2014
, “
Optimization of Vortex Generators Positions and Angles in Fin-Tube Compact Heat Exchanger at Low Reynolds Number
,”
Ph.D. dissertation
, Sao Paulo State University, Sao Paulo, Brazil.http://www.teses.usp.br/teses/disponiveis/3/3150/tde-26122014-120408/pt-br.php
13.
Dupont
,
F.
,
Gabillet
,
C.
, and
Bot
,
P.
,
2003
, “
Experimental Study of the Flow in a Compact Heat Exchanger Channel With Embossed-Type Vortex Generators
,”
ASME J. Fluid Eng.
,
125
(
4
), pp.
701
709
.
14.
Biswas
,
G.
,
Mitra
,
N. K.
, and
Fiebig
,
M.
,
1994
, “
Heat Transfer Enhancement in Fin-Tube Heat Exchangers by Winglet Type Vortex Generators
,”
Int. J. Heat Mass Transfer
,
37
(
2
), pp.
283
291
.
15.
Biswas
,
G.
,
Torii
,
K.
, and
Nishino
,
K.
,
1996
, “
Numerical and Experimental Determination of Flow Structure and Heat Transfer Effects of Longitudinal Vortices in a Channel Flow
,”
Int. J. Heat Mass Transfer
,
39
(
16
), pp.
3441
3451
.
16.
Jacobi
,
A. M.
, and
Shah
,
R. K.
,
1995
, “
Heat Transfer Surface Enhancement Through the Use of Longitudinal Vortices: A Review of Recent Progress
,”
Exp. Therm. Fluid Sci.
,
11
(
3
), pp.
295
309
.
17.
Joardar
,
A.
, and
Jacobi
,
A. M.
,
2006
, “
A Numerical Study of Flow and Heat Transfer Enhancement Using an Array of Delta-Winglet Vortex Generators in a Fin-and-Tube Heat Exchanger
,”
ASME J. Heat Transfer
,
129
(
9
), pp.
1156
1167
.
18.
Fiebig
,
M.
,
1995
, “
Embedded Vortices in Internal Flow: Heat Transfer and Pressure Loss Enhancement
,”
Int. J. Heat Fluid Flow
,
16
(
5
), pp.
376
388
.
19.
Pesteei
,
S. M.
,
Subbarao
,
P. M. V.
, and
Agarwal
,
R. S.
,
2005
, “
Experimental Study of the Effect of Winglet Location on Heat Transfer Enhancement and Pressure Drop in Fin-Tube Heat Exchangers
,”
Appl. Therm. Eng.
,
25
(
11–12
), pp.
1684
1696
.
20.
Saha
,
P.
,
Biswas
,
G.
,
Mandal
,
A. C.
, and
Sarkar
,
S.
,
2017
, “
Investigation of Coherent Structures in a Turbulent Channel With Built-in Longitudinal Vortex Generators
,”
Int. J. Heat Mass Transfer
,
104
, pp.
178
198
.
21.
Tian
,
L. T.
,
He
,
Y. L.
,
Lei
,
Y. G.
, and
Tao
,
W. Q.
,
2009
, “
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
), pp.
111
120
.
22.
Tiwari
,
S.
,
Prasad
,
P. L. N.
, and
Biswas
,
G.
,
2003
, “
A Numerical Study of Heat Transfer in Fin–Tube Heat Exchangers Using Winglet-Type Vortex Generators in Common-Flow Down Configuration
,”
Prog. Comput. Fluid Dyn.
,
3
(
1
), pp.
32
41
.
23.
Hwang
,
S. W.
,
Kim
,
D. H.
,
Min
,
J. K.
, and
Jeong
,
J. H.
,
2012
, “
CFD Analysis of Fin Tube Heat Exchanger With a Pair of Delta Winglet Vortex Generators
,”
J. Mech. Sci. Technol.
,
26
(
9
), pp.
2949
2958
.
24.
Kwak
,
K. M.
,
Torii
,
K.
, and
Nishino
,
K.
,
2003
, “
Heat Transfer and Pressure Loss Penalty for the Number of Tube Rows of Staggered Finned-Tube Bundles With a Single Transverse Row of Winglets
,”
Int. J. Heat Mass Transfer
,
46
(
1
), pp.
175
180
.
25.
Allison
,
C. B.
, and
Dally
,
B. B.
,
2007
, “
Effect of a Delta-Winglet Vortex Pair on the Performance of a Tube–Fin Heat Exchanger
,”
Int. J. Heat Mass Transfer
,
50
(
25–26
), pp.
5065
5072
.
26.
Kim
,
E.
, and
Yang
,
J. S.
,
2002
, “
An Experimental Study of Heat Transfer Characteristics of a Pair of Longitudinal Vortices Using Color Capturing Technique
,”
Int. J. Heat Mass Transfer
,
45
(
16
), pp.
3349
3356
.
27.
He
,
Y. L.
,
Chu
,
P.
,
Tao
,
W. Q.
,
Zhang
,
Y. W.
, and
Xie
,
T.
,
2013
, “
Analysis of Heat Transfer and Pressure Drop for Fin-and-Tube Heat Exchangers With Rectangular Winglet-Type Vortex Generators
,”
Appl. Therm. Eng.
,
61
(
2
), pp.
770
783
.
28.
Pal
,
A.
,
Bandyopadhyay
,
D.
,
Biswas
,
G.
, and
Eswaran
,
V.
,
2012
, “
Enhancement of Heat Transfer Using Delta-Winglet Type Vortex Generators With a Common-Flow-Up Arrangement
,”
Numer. Heat Transfer, Part A
,
61
(
12
), pp.
912
928
.https://www.tandfonline.com/doi/abs/10.1080/10407782.2012.677322
29.
Zeng
,
M.
,
Tang
,
L. H.
,
Lin
,
M.
, and
Wang
,
Q. W.
,
2010
, “
Optimization of Heat Exchangers With Vortex-Generator Fin by Taguchi Method
,”
Appl. Therm. Eng.
,
30
(
13
), pp.
1775
1783
.
30.
Tang
,
L. H.
,
Zeng
,
M.
, and
Wang
,
Q. W.
,
2009
, “
Experimental and Numerical Investigation on Air-Side Performance of Fin-and-Tube Heat Exchangers With Various Fin Patterns
,”
Exp. Therm. Fluid Sci.
,
33
(
5
), pp.
818
827
.
31.
Song
,
G. D.
, and
Nishino
,
K.
,
2008
, “
Numerical Investigation for Net Enhancement in Thermal-Hydraulic Performance of Compact Fin-Tube Heat Exchangers With Vortex Generators
,”
J. Therm. Sci. Technol.
,
3
(
2
), pp.
368
380
.
32.
Wu
,
J. M.
, and
Tao
,
W. Q.
,
2007
, “
Investigation on Laminar Convection Heat Transfer in Fin-and-Tube Heat Exchanger in Aligned Arrangement With Longitudinal Vortex Generator From the Viewpoint of Field Synergy Principle
,”
Appl. Therm. Eng.
,
27
(
14–15
), pp.
2609
2617
.
33.
Brien
,
J. E. O.
,
Sohal
,
M. S.
,
Foust
,
T. D.
, and
Wallstedt
,
P. C.
,
2002
, “
Heat Transfer Enhancement for Finned-Tube Heat Exchangers With Vortex Generators: Experimental and Numerical Results
,”
12th International Heat Transfer Conference
, Grenoble, France, Aug. 18–23,https://digital.library.unt.edu/ark:/67531/metadc883400/m1/1/
34.
Leu
,
J. S.
,
Wu
,
Y. H.
, and
Jang
,
J. Y.
,
2004
, “
Heat Transfer and Fluid Flow Analysis in Plate-Fin and Tube Heat Exchangers With a Pair of Block Shape Vortex Generators
,”
Int. J. Heat Mass Transfer
,
47
(
19–20
), pp.
4327
4338
.
35.
Gholami
,
A. A.
,
Wahid
,
M. A.
, and
Mohammed
,
H. A.
,
2014
, “
Heat Transfer Enhancement and Pressure Drop for Fin-and-Tube Compact Heat Exchangers With Wavy Rectangular Winglet-Type Vortex Generators
,”
Int. Commun. Heat Mass Transfer
,
54
, pp.
132
140
.
36.
Lotfi
,
B.
,
Zeng
,
M.
,
Sundén
,
B.
, and
Wang
,
Q.
,
2014
, “
Thermo-Hydraulic Characterization of the Smooth Wavy Fin-and-Elliptical Tube Heat Exchangers Using New Type Vortex Generators
,”
Energy Procedia
,
61
, pp.
2343
2346
.
37.
Gong
,
B.
,
Wang
,
L. B.
, and
Lin
,
Z. M.
,
2015
, “
Heat Transfer Characteristics of a Circular Tube Bank Fin Heat Exchanger With Fins Punched Curve Rectangular Vortex Generators in the Wake Regions of the Tubes
,”
Appl. Therm. Eng.
,
75
, pp.
224
238
.
38.
Zhang
,
L. Z.
,
Zhong
,
W. C.
,
Chen
,
J. M.
, and
Zhou
,
J. R.
,
2011
, “
Fluid Flow and Heat Transfer in Plate-Fin and Tube Heat Exchangers in a Transitional Flow Regime
,”
Numer. Heat Transfer, Part A:
,
60
(
9
), pp.
766
784
.
39.
Chu
,
P.
,
He
,
Y. L.
,
Lei
,
Y. G.
,
Tian
,
L. T.
, and
Li
,
R.
,
2009
, “
Three-Dimensional Numerical Study on Fin-and-Oval-Tube Heat Exchanger With Longitudinal Vortex Generators
,”
Appl. Therm. Eng.
,
29
(
5–6
), pp.
859
876
.
40.
Song
,
K. W.
, and
Wang
,
L. B.
,
2013
, “
The Effectiveness of Secondary Flow Produced by Vortex Generators Mounted on Both Surfaces of the Fin to Enhance Heat Transfer in a Flat Tube Bank Fin Heat Exchanger
,”
ASME J. Heat Transfer
,
135
(
4
), pp.
41902
41911
.
41.
Lemouedda
,
A.
,
Breuer
,
M.
,
Franz
,
E.
,
Botsch
,
T.
, and
Delgado
,
A.
,
2010
, “
Optimization of the Angle of Attack of Delta-Winglet Vortex Generators in a Plate-Fin-and-Tube Heat Exchanger
,”
Int. J. Heat Mass Transfer
,
53
(
23–24
), pp.
5386
5399
.
42.
Song
,
K. W.
,
Wang
,
L. B.
,
Fan
,
J. F.
,
Zhang
,
Y. H.
, and
Liu
,
S.
,
2008
, “
Numerical Study of Heat Transfer Enhancement of Finned Flat Tube Bank Fin With Vortex Generators Mounted on Both Surfaces of the Fin
,”
Heat Mass Transfer
,
44
(
8
), pp.
959
967
.
43.
Huisseune
,
H.
,
T'Joen
,
C.
,
Jaeger
,
P. D.
,
Ameel
,
B.
,
Schampheleire
,
S. D.
, and
Paepe
,
M. D.
,
2013
, “
Performance Enhancement of a Louvered Fin Heat Exchanger by Using Delta Winglet Vortex Generators
,”
Int. J. Heat Mass Transfer
,
56
(
1–2
), pp.
475
487
.
44.
Li
,
M. J.
,
Zhou
,
W. J.
,
Zhang
,
J. F.
,
Fan
,
J. F.
,
He
,
Y. L.
, and
Tao
,
W. Q.
,
2014
, “
Heat Transfer and Pressure Performance of a Plain Fin With Radiantly Arranged Winglets Around Each Tube in Fin-and-Tube Heat Transfer Surface
,”
Int. J. Heat Mass Transfer
,
70
, pp.
734
744
.
45.
Zhou
,
G.
, and
Ye
,
Q.
,
2012
, “
Experimental Investigations of Thermal and Flow Characteristics of Curved Trapezoidal Winglet Type Vortex Generators
,”
Appl. Therm. Eng.
,
37
, pp.
241
248
.
46.
Tian
,
L.
,
He
,
Y.
,
Tao
,
Y.
, and
Tao
,
W.
,
2009
, “
A Comparative Study on the Air-Side Performance of Wavy Fin-and-Tube Heat Exchanger With Punched Delta Winglets in Staggered and Inline Arrangements
,”
Int. J. Therm. Sci.
,
48
(
9
), pp.
1765
1776
.
47.
ANSYS
,
2013
,
ANSYS Fluent User's Guide
,
ANSYS
,
Canonsburg, PA
.
48.
Kwak
,
K. M.
,
Torii
,
K.
, and
Nishino
,
K.
,
2005
, “
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
), pp.
625
632
.
49.
Lotfi
,
B.
,
Sundén
,
B.
, and
Wang
,
Q.
,
2016
, “
An Investigation of the Thermo-Hydraulic Performance of the Smooth Wavy Fin-and-Elliptical Tube Heat Exchangers Utilizing New Type Vortex Generators
,”
Appl. Energy
,
162
, pp.
1282
1302
.
50.
LaHaye
,
P. G.
,
Neugebauer
,
F. J.
, and
Sakhuja
,
R. K.
,
1974
, “
A Generalized Prediction of Heat Transfer Surfaces
,”
ASME J. Heat Transfer
,
96
(
4
), pp.
511
517
.
You do not currently have access to this content.