Structural design of aeroengine radiators: State of the art and perspectives

Propulsion and Power Research, Journal Year: 2024, Volume and Issue: 13(3), P. 319 - 334

Published: Sept. 1, 2024

Language: Английский

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Numerical Study on Steam Cooling Characteristics in a Isosceles Trapezoidal Channel with Pin-Fin Arrays at Turbine Blade Trailing Edge

Energies, Journal Year: 2024, Volume and Issue: 17(11), P. 2482 - 2482

Published: May 22, 2024

Using the SST k-ω turbulence model, a comprehensive numerical investigation was conducted to analyze flow and heat transfer characteristics of steam within an isosceles trapezoidal cooling channel with pin-fin arrays modeled from trailing edge F-class gas turbine high-temperature blade. The influence laws various parameters, including Reynolds number (Re, 10,000 50,000), dimensionless diameter (d/H, 0.4 0.8), spacing (S/H, 1.6 2.4), on performance were examined. Sensitivity analysis employed determine relative significance these parameters arrays. Finally, corresponding friction correlations investigated parameter range developed. research findings reveal that under different numbers, as increases 0.8, factor by 3.25 3.41, while overall average Nusselt improves 31.05% 37.41%. Conversely, when 2.4, decreases 67.38% 69.18%, accompanied reduction in 24.95% 31.14%. When both are taken into account, importance ranks follows: number, diameter, spacing. It also suggests smaller diameters larger should be selected design stage based variation integrated thermal-hydraulic performance. results may provide valuable references insights for structures blade channels advanced turbines.

Language: Английский

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Deep reinforcement learning and mesh deformation integration for shape optimization of a single pin fin within a micro channel

International Journal of Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 236, P. 126242 - 126242

Published: Oct. 2, 2024

Language: Английский

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Experimental study of the flow boiling heat transfer characteristics of teardrop-like micro-pin-finned chip surface in semi-open microchannel

International Journal of Heat and Mass Transfer, Journal Year: 2024, Volume and Issue: 238, P. 126442 - 126442

Published: Nov. 19, 2024

Language: Английский

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The influence of pin fin structure on the flow and heat transfer characteristics of the manifold microchannel heat sink

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 125119 - 125119

Published: Dec. 1, 2024

Language: Английский

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The Effect of Drop-Shaped Pin Fin on the Heat Transfer of Finned Tube

Published: April 16, 2024

The heat transfer characteristics of airflow passing over a tube embedded with pin fins have been numerically investigated. A comparison was made between circular and drop-shaped fins, both having identical cross-sectional areas arranged in-line. Reynolds number, based on the hydraulic diameter, varied from 5430 to 27170. effectiveness found be higher than that by $4.88-19.59 \%$. Concerning specific performance parameters, emerge as an encouraging alternative configuration their counterparts.

Language: Английский

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The impact of drop-shaped pin-fins on the thermal and hydraulic characteristics of a finned tube

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(7)

Published: July 1, 2024

In this study, circular and drop-shaped pin-fins were employed to investigate the influence of on thermal behavior flow characteristics finned tubes using a combination experimental numerical methods. The configuration in-line was analyzed compared with that smooth tube. analysis covered Reynolds numbers spanning from Re = 7.03 × 103 35.17 103. Thermal hydraulic contours depicted. Two methodologies utilized assess overall performance. outcomes demonstrated average Nusselt number for equipped drop rose by approximately 50.03%–93.1% 59.59%–77.08%, respectively, in comparison Moreover, tube displayed reduced friction factor, leading reduction 1.36%–7.95% counterpart. Furthermore, both exhibited 2.93%–54.89% 7.33%–37.1% higher efficiency, Generalized correlations developed compute number, effectiveness relation aim providing guidance future research design efforts heat exchangers incorporating pin-fin tubes. utilization featuring plays significant role energy conservation.

Language: Английский

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Comparative Assessment of Flow Patterns and Hydrodynamics in Cylindrical and Hourglass-Shaped Pin-Fin Configurations

Lecture notes in mechanical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 692 - 702

Published: Jan. 1, 2024

Language: Английский

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Numerical Investigation of Enhanced Heat Transfer with Micro Pin Fins in Heat Exchangers

Micromachines, Journal Year: 2024, Volume and Issue: 15(9), P. 1120 - 1120

Published: Aug. 31, 2024

Pin-fin and flat-tube heat exchangers (PFFTHXs) offer a promising alternative to traditional louvered-fin (LFFTHXs), especially when used as evaporators. The streamlined structure of pin fins helps effectively remove condensate defrost water. In this study, we conducted numerical analysis 60 different pin-fin configurations across three diameters enhance transfer in PFFTHXs. Our investigation focused on how pitch affects both airflow efficiency. results show that closer increases the rate per unit area pressure drop for given velocity. We evaluated overall performance these using frontal obtained at equivalent fan power levels. identified optimal each diameter, with 0.2 mm diameter configuration demonstrating highest efficiency-this was par louvered but fewer resources. This makes it an ideal choice evaporative applications

Language: Английский

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Optimization of geometric configurations for enhanced thermal performance in microchannel finned plates

World Journal of Advanced Engineering Technology and Sciences, Journal Year: 2024, Volume and Issue: 12(2), P. 926 - 937

Published: Aug. 30, 2024

This study investigates the thermal performance of microchannel finned plates by comparing various geometric configurations and operating conditions. Twelve models (a to l) were evaluated varying parameters such as fin height, spacing, channel width, well factors like inlet velocity heat flux. The results reveal that increasing height decreasing spacing enhance transfer expanding surface area, though at cost increased pressure drops higher pumping power requirements. Variations in width impact flow characteristics, with wider channels reducing temperature but potentially lowering convective efficiency. Higher velocities improve cooling increase drops, while elevated fluxes lead steeper gradients. Model k was found provide an optimal balance between efficiency drop, l’s novel geometry showed unique distributions warranting further exploration. Temperature contours volume renders demonstrated air increases across models, ranging from 4.78 K 17.36 K, flux measurements confirmed significant influence configuration on performance. findings offer valuable insights for optimizing design enhanced effective management applications.

Language: Английский

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