Comparisons of Local Experimental Results with Numerical Results of Heat Transfer Enhancement of a Flat Tube Bank Fin with Vortex Generators

2009 ◽  
Vol 55 (2) ◽  
pp. 144-162 ◽  
Author(s):  
Yu-Ying Chen ◽  
Ke-Wei Song ◽  
Liang-Bi Wang ◽  
Dong-Liang Sun
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Numerical Results ◽  
Experimental Results ◽  
Vortex Generators ◽  
Transfer Enhancement ◽  
Tube Bank ◽  
Flat Tube

Tube Transverse Pitch Effect on Heat/Mass Transfer Characteristics of Flat Tube Bank Fin Mounted With Vortex Generators

2008 ◽  
Vol 130 (6) ◽  
Author(s):  
Song Liu ◽  
Liangbi Wang ◽  
Jufang Fan ◽  
Yongheng Zhang ◽  
Yuanxin Dong ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat Transfer Enhancement ◽  
Heat Mass Transfer ◽  
Isothermal Condition ◽  
Vortex Generators ◽  
Transfer Enhancement ◽  
Tube Bank ◽  
Flat Tube ◽  
Tube Pitch

For one heat exchanger model of three-row flat tube bank fin mounted with vortex generators (VGs), the effect of transversal tube pitch on heat/mass transfer performance was investigated by the experimental method of naphthalene sublimation. For the same arrangement of VGs around the tube, it is found that the larger the transversal tube pitch, the larger the heat transfer enhancement because of less interactions of vortices generated from different VGs. Interaction of vortices decreases the heat transfer enhancement on the fin surfaces with and without VGs for the case with small transversal tube pitch. For isothermal condition, two correlated equations of average Nusselt number and friction factor considering the fin spacing, the attack angle of VG, the height of VG, the ratio of transversal tube pitch, and Reynolds number are reported.

scholarly journals Heat transfer behind the backward-facing step in the presence of longitudinal vortex generators installed at an angle to each other

2021 ◽  
Vol 2119 (1) ◽  
pp. 012013
Author(s):  
V I Terekhov ◽  
A Yu Dyachenko ◽  
V L Zhdanov ◽  
Ya J Smulsky
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Experimental Results ◽  
Step Edge ◽  
Vortex Generators ◽  
Longitudinal Vortex ◽  
Transfer Enhancement ◽  
Backward Facing Step ◽  
Average Heat

Abstract The paper presents the experimental results on the control of heat transfer enhancement behind the backward-facing step at Re = 4000. The flow is controlled by a pair of longitudinal vortex generators (LVGs) installed at the step edge. The pair of vortex generators (VG) consists of two plates positioned symmetrically relative to the flow. The influence of the height, the angle of VG installation relative to the flow, the distance between VG pairs and the shape of the plate on local and average heat transfer is investigated.

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