A numerical model analysis on perforated aerofoil shaped pin fin arrays in heat dissipation enhancement, pressure drop and optimization

Bhaumik, Mainak; Dhanawade, Kavita; Sur, Anirban

doi:10.1016/j.matpr.2023.05.491

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…However, the shape and layout of the fins play a crucial role in enhancing heat transfer. Bhaumik et al [45] developed a numerical model to analyze perforated aerofoil-shaped fin arrays in staggered and in-line arrangements, finding that the staggered configuration exhibits higher heat dissipation. Additionally, their results showed that the presence of circular perforations in the aerofoil fins contributes to material savings, improved thermal efficiency, overall effectiveness, and economy.…”

Section: Introductionmentioning

confidence: 99%

Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array

Yalçınkaya,

Durmaz,

Tepe

et al. 2024

Energies

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The main purpose of this investigation was to explore the heat transfer and flow characteristics of aero-foil-shaped fins combined with extended jet holes, specifically focusing on their feasibility in cooling turbine blades. In this study, a comprehensive investigation was carried out by applying impinging jet array cooling (IJAC) on a semi-circular curved surface, which was roughened using aerofoil-shaped fins. Numerical computations were conducted under three different Reynolds numbers (Re) ranging from 5000 to 25,000, while nozzle-to-target surface spacings (S/d) ranged from 0.5 to 8.0. Furthermore, an assessment was made of the impact of different fin arrangements, single-row (L1), double-row (L2), and triple-row (L3), on convective heat transfer. Detailed examinations were performed on area-averaged and local Nusselt (Nu) numbers, flow properties, and the thermal performance criterion (TPC) on finned and smooth target surfaces. The study’s results revealed that the use of aerofoil-shaped fins and the reduction in S/d, along with surface roughening, led to significant increases in the local and area-averaged Nu numbers compared to the conventional IJAC scheme. The most notable heat transfer enhancement was observed at S/d = 0.5 utilizing extended jets and the surface design incorporating aerofoil-shaped fins. Under these specific conditions, the maximum heat transfer enhancement reached 52.81%. Moreover, the investigation also demonstrated that the highest TPC on the finned surface was achieved when S/d = 2.0 for L2 at Re = 25,000, resulting in a TPC value of 1.12. Furthermore, reducing S/d and mounting aerofoil-shaped fins on the surface yielded a more uniform heat transfer distribution on the relevant surface than IJAC with a smooth surface, ensuring a relatively more uniform heat transfer distribution to minimize the risk of localized overheating.

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Section: Introductionmentioning

confidence: 99%

Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array

Yalçınkaya,

Durmaz,

Tepe

et al. 2024

Energies

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Enhancement of heat dissipation rate of a heat sink with perforated fins using CFD and Swarm Intelligence

Maji,

Deshamukhya,

Choubey

2024

Heat Trans

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This study aims to enhance heat dissipation in a heat sink by using perforated pin fins. The research specifically explores circular pin fins with circular perforations that taper from one end to the other. Through three‐dimensional computational fluid dynamics (CFD) simulations, the study evaluates the impact of tapered perforations on heat dissipation, performance, and pressure loss in circular fins. The results indicate that fins with perforations consistently achieve higher heat dissipation rates compared to solid fins, up to certain perforation sizes and numbers. Notably, fins with tapering in perforations, where the inner and outer diameters are 4 and 5 mm, respectively, exhibit the highest system performance, with a maximum increase of 6.1% over fins without tapering. Additionally, two advanced swarm intelligence algorithms, Particle Swarm Optimization (PSO) and Teaching Learning Based Algorithm (TLBO), were employed to assess the performance of heat sinks with both converging and diverging tapered perforations. The optimized results from TLBO were compared with those from PSO for validation. An intriguing discovery of this research is that fins with converging perforations achieve the highest system performance, followed by fins without tapering, and then fins with diverging perforations.

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Thermal performance enhancement of a micro-jet heat sink via parametric investigated micro pin fin arrays

Xue,

Yan,

Shen

et al. 2024

International Journal of Thermal Sciences

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A numerical model analysis on perforated aerofoil shaped pin fin arrays in heat dissipation enhancement, pressure drop and optimization

Cited by 3 publications

References 35 publications

Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array

Heat and Flow Characteristics of Aerofoil-Shaped Fins on a Curved Target Surface in a Confined Channel for an Impinging Jet Array

Enhancement of heat dissipation rate of a heat sink with perforated fins using CFD and Swarm Intelligence

Thermal performance enhancement of a micro-jet heat sink via parametric investigated micro pin fin arrays

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