Heat transfer enhancement by winglet-type vortex generator arrays in compact plain-fin-and-tube heat exchangers

Joardar, Arindom; Jacobi, Anthony M.

doi:10.1016/j.ijrefrig.2007.04.011

Cited by 195 publications

(83 citation statements)

References 12 publications

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“…A review on the heat transfer enhancement using longitudinal vortices was presented by Jacobi and Shah [6]. By positioning a row of vortex generators on the fin surface in between the tubes ('common flow-up') Joardar et al [7] reported a 16.5% -44% increase in the heat transfer coefficient for Re between 220 and 960 (0.7 m/s < V < 1.8m/s). The vortex generators result in an accelerated flow due to the nozzle-like passage near the tube walls which can also help to reduce the size of the tube wake, as shown by O'Brien et al [8].…”

Section: Secondary Flows: Longitudinal Vorticesmentioning

confidence: 99%

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

T’Joen¹,

Huisseune²,

Canière³

et al. 2011

International Journal of Heat and Mass Transfer

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In this study the inclined louvered fin, a hybrid fin design based on the slit fin and louvered fin design is considered. The goal of the research program is to investigate the interaction between the flow behaviour (flow deflection and transition to unsteady flow) and the thermo-hydraulics of the fin design. This approach was selected in order to reveal the flow physics behind the transitions found in the thermo-hydraulic data.

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Section: Secondary Flows: Longitudinal Vorticesmentioning

confidence: 99%

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

T’Joen¹,

Huisseune²,

Canière³

et al. 2011

International Journal of Heat and Mass Transfer

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“…A study into the effects of delta winglet type VG to the increase of heat transfer in a compact plate-fin-and-tube heat exchanger with the actual geometry was conducted by Joardar and Jacobi [18]. From their research showed that air-side heat transfer coefficient increased by 68% compared with that without using VG.…”

Section: Introductionmentioning

confidence: 99%

“…3D delta wing provides enhancement of heat transfer by 37% and increases in pressure loss by 15%. He et al examined numerically what has been done by Joardar and Jacobi [18] by replacing a delta winglet VG with rectangular winglet [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of concave rectangular winglet vortex generator on convection coefficient of heat transfer

Syaiful¹,

Sugiri²,

Soetanto³

et al. 2017

AIP Conference Proceedings

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“…In fin and tube heat exchanger often negligible heat transfer takes place in the downstream of the circular tube due to a low velocity fluid which can be enhanced by several hundred percent by placing VG in the wake region behind the tubes (Biswas et al , 1994;Joardar and Jacobi , 2008). Several experimental and numerical studies on different configurations of VGs have been carried out over the last two decades (Turk and Junkhan , 1986;Joardar and Jacobi , 2008;Tiggelbeck et al , 1992Tiggelbeck et al , , 1993Jacobi and Shah , 1995;Jang et al , 2013) including fin and tube heat exchangers (Fiebig , 1995;.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of conjugate heat transfer and flow performance of a fin and tube heat exchanger with vortex generators

Singh

Sørensen

2017

Linköping Electronic Conference Proceedings

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Vortex generator is considered as an effective device for augmentation of the thermal-hydraulic performance of a heat exchanger. The aim of present study is to examine the influence of vortex generators on a double fin and tube heat exchanger performance. Vortex generator of rectangular winglet type is chosen and investigated at different angles of attack 0 • , −10 • and −20 • with the flow direction. Three-dimensional numerical model is developed and simulations are performed for a Reynolds number range 5000 ≤ Re ≤ 11000 taking conjugate heat transfer into account. The heat transfer and pressure loss characteristics are determined and analyzed for an in-line configuration of a fin and tube heat exchanger. In order to evaluate the enhancement in the performance on an equitable basis, the heat exchanger with plain fin surface is considered as a reference design. Results show that the angle of attack of a vortex generator has a significant impact on the volume goodness factor, and enhance the thermal performance of a fin and tube heat exchanger in comparison to the design with plain fin. The vortex generator at an angle of attack −10 • is found to perform superior over the Reynolds number range studied. At Re = 5000, the vortex generator with an angle of attack −10 • increases the volume goodness factor by 32% with respect to the baseline heat exchanger design.

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Heat transfer enhancement by winglet-type vortex generator arrays in compact plain-fin-and-tube heat exchangers

Cited by 195 publications

References 12 publications

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

Interaction between mean flow and thermo-hydraulic behaviour in inclined louvered fins

Effect of concave rectangular winglet vortex generator on convection coefficient of heat transfer

Numerical investigation of conjugate heat transfer and flow performance of a fin and tube heat exchanger with vortex generators

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