Heat Exchangers in the Aviation Engineering

Carozza, Antonio

doi:10.5772/67486

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…Aircraft heat exchangers of (̇= 100 ) are already widely used for cabin air conditioning and engine oil cooling, cf. (Carozza, 2017), (Wright et al, 2018) and (Vargas and Bejan, 2001). As demonstrated by (Kellermann et al, 2019) heat transfer rates of few MW can be achieved under favourable conditions and using the complete aircraft surface.…”

Section: Introductionmentioning

confidence: 89%

Heat Release of Fuel Cell Powered Aircraft

Kožulović¹

2020

Proceedings of Global Power &Amp; Propulsion Society

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Using a hydrogen fuel cell as primary power supply for the aircraft propulsion system, the heat dumping poses a large challenge, since the generated heat transfer rate is of the same magnitude as the electric power generated. An appropriate liquid cooling system and corresponding heat exchanger are sized in a preliminary manner and their impact at the aircraft performance is assessed, among others the additional power demand and weight, but in particular the additional drag of the heat exchanger. These results can be considered as first order estimations. It is found that the propulsive power demand of a mid-size commercial aircraft is increased by 27.3% at cruise flight by installing a suitable heat exchanger. Corresponding dimensions are sized and favourable parameters of the heat exchanger are estimated. For example, best performance is achieved if the inlet velocity to the heat exchanger is reduced to 15% of the flight velocity, the diameter based Reynolds number of the heat transferring tubes is 3100, the length of the tubes is 0.217 m and the frontal area is 84% of the fuselage cross section. Due to large frontal area, the integration of the heat exchanger has been identified as a demanding task with considerable impact at the additional drag.

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Section: Introductionmentioning

confidence: 89%

Heat Release of Fuel Cell Powered Aircraft

Kožulović¹

2020

Proceedings of Global Power &Amp; Propulsion Society

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“…Additive manufacturing (AM) offers the opportunity to explore new designs and boost the optimization of CHX. [1]. For instance, as shown by Saltzman et al [2], they obtained an improvement around 10 percent compared to heat exchangers built with traditional manufacturing.…”

Section: Introductionmentioning

confidence: 93%

Roughness-Resolved LES of Additive Manufacturing-Like Channel Flows

Meynet

Barge

Moureau

et al. 2022

Volume 6B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Coo

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In the last decade, progresses in additive manufacturing (AM) have paved the way for optimized heat exchangers whose disruptive design will heavily rely on predictive numerical simulations. However, due to typical roughness induced by AM, current wall models used in steady and unsteady 3D Navier-Stokes simulations do not take into account such characteristics. For the development and assessment of novel wall models for AM, a high-fidelity roughness-resolved Large-Eddy Simulation (RRLES) database is built. This article describes the numerical setup and the methodology used for conducting RRLES, from surface generation to post-processing. In addition, three different cases representing two printing directions plus a streamwise and spanwise isotropic case are investigated. While the roughness distributions are the same in the three cases, the effective slope (ES) is very different and the impact of this parameter on turbulence and heat transfer is analyzed at different Reynolds numbers.

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“…Among the various types of heat exchangers, tubular designs like shell-and-tube and tube-and-fin are the most prevalent. These types have seen extensive development and refinement over many decades, making them a mature and reliable choice in heat exchange technology [1,2].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer and Flow Resistance in Crossflow over Corrugated Tube Banks

Zhong,

Zhao,

Zhao

et al. 2024

Energies

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The engineering of tubes with surface corrugations is recognized as an effective method for enhancing heat transfer within the tube. Yet the impact of surface corrugation on the flow and heat transfer around the tube’s exterior remains inadequately explored. This study investigates the crossflow and heat transfer characteristics in banks of periodically inward-corrugated tubes using computational fluid dynamics. Numerical simulations were performed for both in-line and staggered tube arrangements, covering Reynolds numbers from 1000 to 10,000. The aim was to examine how various corrugation parameters affect heat transfer and flow dynamics in tube banks configured in both in-line and staggered layouts. The results show that the heat transfer and the pressure drop in crossflow across tube banks are substantially influenced by changes in corrugation parameters. Specifically, in the in-line arrangement, both the Nusselt number and Euler number decrease significantly as the corrugation height increases. In contrast, in the staggered arrangement, the Nusselt number and Euler number exhibit less variation in response to surface corrugation. A comparative analysis of performance criteria suggests that a staggered arrangement is more advantageous for improving thermal–hydraulic efficiency in crossflow through corrugated tube banks.

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Heat Exchangers in the Aviation Engineering

Cited by 5 publications

References 17 publications

Heat Release of Fuel Cell Powered Aircraft

Heat Release of Fuel Cell Powered Aircraft

Roughness-Resolved LES of Additive Manufacturing-Like Channel Flows

Heat Transfer and Flow Resistance in Crossflow over Corrugated Tube Banks

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