Impact of leading edge delta-wing vortex generators on the thermal performance of a flat tube, louvered-fin compact heat exchanger

Joardar, Arindom; Jacobi, Anthony M.

doi:10.1016/j.ijheatmasstransfer.2004.10.018

Cited by 83 publications

(30 citation statements)

References 19 publications

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“…They reported a heat transfer enhancement of 32% at Re Lp = 1000 for two rows of delta wings, one array at the inlet and one at half the flow length. Joardar et al [10] The literature survey presented above summarizes the ideas behind the evolution of modern compact finand-tube heat exchangers up to today. A similar review up to 1998 was provided by Jacobi and Shah [25].…”

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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“…Free stream temperature of water (T water ) is taken as 343 K and the convective heat transfer coefficient (h water ) is calculated as 9100 W/m 2 ⋅K using the Gnielinski correlation given by Eq. (1) (Kakaç and Yener, 1995).…”

Section: Boundary Conditions and Materials Propertiesmentioning

confidence: 99%

“…Their findings revealed that the configuration they proposed leads to a heat transfer increase while causes a lower pressure drop values compared to the plain fin without a winglet. Joardar and Jacobi (2005) undertook an experimental investigation in order to evaluate the thermal performance of louvered fins with delta wings. An average of 21% heat transfer coefficient increase compared to the case without a winglet was observed for the investigated air velocities in dry conditions.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Pressure Drop Characteristics of Fin-Tube Heat Exchangers with Different Types of Vortex Generator Configurations

et al. 2010

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A fin-and-tube heat exchanger with three different types of vortex generators is investigated in this study in order to observe the effects of these vortex generators on heat transfer and pressure drop characteristics. The individual as well as the cumulative influences of the vortex generators on the performance of a heat exchanger are examined. The numerical analyses are performed using a computational fluid dynamics (CFD) program named "Fluent". Firstly, each vortex generator type is placed at four different locations on the fin to determine its best location in terms of heat transfer and pressure drop values. After the determination of the best location on the fin for a vortex generator of each type, two different models with all three types of vortex generators are created and analyzed numerically. The investigation of the cumulative effect of three different vortex generators is the novelty of the study. The results of the study show that the use of three different vortex generators together increases heat transfer rate with a moderate increase in pressure drop value. The comparison of the present study results with an experimental and numerical study showed also a good agreement.

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“…The investigations of various turbulators in flat plate-fin heat exchanger on both numerically and experimentally were reported by Joardar and Jacobi, 2005;Gentry and Jacobi, 1997;Chen and Shu, 2004;Wu and Tao, 2012;and Li-Ting et al, 2009. They concluded that the uses of turbulators in the compact heat exchanger lead to enhance heat transfer and thermal performance in the heat system.…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment and Empirical Correlation in a Heat Exchanger Square Duct With Diagonal Inserted Generators

Boonloi¹

2014

Frontiers in Heat and Mass Transfer

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A mathematical analysis of the heat transfer enhancement, thermal performance and flow configurations in a heat exchanger square duct with diagonal inserted plate vortex generators is presented. The 30 o V-shaped baffles are modified and placed on the double sides of the thin plate or frame (with no plate) which inserted diagonally in the square duct. The effects of blockage ratio (b/H, BR), the pitch ratio (p/H, PR), flow direction (V-Downstream and V-Upstream) and configuration of inserting plate are investigated for Reynolds number based on the hydraulic diameter of the square duct, Dh, Re = 100 -2000. The finite volume method applies for the computational domains. The numerical results show that the use of the diagonal inserted generators can help to increase heat transfer rates and thermal performance in the square duct higher than the smooth duct with no generators. The presences of the diagonal inserted generators not only increase heat transfer rates but also increase very enlarges pressure loss. The maximum thermal enhancement factor is around 3.25 at the highest Reynolds number. In addition, the use of the diagonal inserted generators can help to install and also comfortable to maintenance in the heat exchange duct.

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Impact of leading edge delta-wing vortex generators on the thermal performance of a flat tube, louvered-fin compact heat exchanger

Cited by 83 publications

References 19 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

Heat Transfer and Pressure Drop Characteristics of Fin-Tube Heat Exchangers with Different Types of Vortex Generator Configurations

Performance Assessment and Empirical Correlation in a Heat Exchanger Square Duct With Diagonal Inserted Generators

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