Development and validation of a compact thermal model for an aircraft compartment

Geron, Marco; Butler, Colin; Stafford, Jason; Newport, David

doi:10.1016/j.applthermaleng.2013.07.012

Cited by 16 publications

(6 citation statements)

References 16 publications

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“…Heat flux measurements are important in many practical applications [1][2][3][4][5]. In micro-electric systems, increasing working efficiency and higher frequency of semiconductor devices require accurate measurement of the heat flux of heat dissipated by the devices [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A method to measure heat flux in convection using Gardon gauge

Fu¹,

Zong²,

Zhang³

et al. 2016

Applied Thermal Engineering

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Heat flux measurements are widely used in thermal environment analyses. The Gardon gauge is an excellent heat flux sensor with a wide measurement range and long lifespan in harsh environments. However, the Gardon gauge is usually calibrated for radiation heat transfer and is not good for convective heat transfer. This paper introduces a method to measure heat flux for convective heat transfer using the Gardon gauge by relating the measurement sensitivity for convection to that for radiation. The heat flux and convective heat-transfer coefficient can then be simultaneously determined by the standard thermo-electromotive voltage output of the Gardon gauge. The method was demonstrated for convective heat-transfer coefficient ranging from 200 to 3000 W/(m 2 K). The analysis illustrates that the measurement sensitivity for convection decreases with increasing convective heat-transfer coefficient. A correction is necessary especially for higher convective heat-transfer coefficient. The corrected convective heat-transfer coefficients and heat fluxes agree well with the actual values. The relative uncertainty in heat flux is within 0.64%. The method not only greatly improves the measurement accuracy of the Gardon gauge for convection applications, but also provides a reference for evaluating convective heat transfer coefficients in convection environments.

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Section: Introductionmentioning

confidence: 99%

A method to measure heat flux in convection using Gardon gauge

Fu¹,

Zong²,

Zhang³

et al. 2016

Applied Thermal Engineering

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“…The current literature on thermal analysis in aircraft focuses mainly on passenger cabin studies [2,3]. Butler et al [4][5][6] published work for the aircraft crown area. With the advent of more electrical actuator technologies, several researchers focused on this particular aspect [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Ventilation Flow Rate and Gap Distance on the Radiative Heat Transfer in Aircraft Avionics Bays

Sanchez¹,

Liscouët-Hanke

Bhise

2022

Aerospace

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The feasibility of the future more-electric, hybrid-electric, and all-electric aircraft configurations will depend on a good understanding of thermal aspects early in the design. However, thermal analysis of aircraft equipment bays is typically performed at later design stages to validate if the design meets the minimal certification requirements rather than to optimize the cooling strategy. The presented work aims to provide new insight into thermal aspects in typical aircraft equipment bays. In particular, system thermal interactions, such as radiation, play a more significant role in tightly packaged bays, such as avionics bays. This paper investigates the influence of radiation on the overall system heat dissipation in two representative avionics bays. Using Computational Fluid Dynamics (CFD) simulation, combined with an analytical approach, the authors analyze the impact of several parameters, such as varying mass flow rates and distances between adjacent systems, on their thermal interaction. The results suggest that the radiative effects must be considered when the gap distance between the systems is larger than 0.1 m, the flow rate between two systems is not strong enough to have high convective heat exchanges, when the systems of interest are hidden by other systems from the ventilation sources, and when the system’s internal heat dissipation is significant. Overall, this paper’s results will contribute enhance conceptual design methods, such as the previously developed Thermal Risk Analysis, and help optimize thermal management strategies for future aircraft.

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“…Butler et al [15] presented a methodology to optimise equipment placement in fuselage confined compartments and developed models to predict the convective heat transfer coefficients of equipment in a crown compartment. Stafford et al [10,16] and Geron et al [17] developed compact thermal-fluid models for the mixed convection regimes for equipment in an aircraft avionics bay and for an unpopulated fuselage compartment for inclusion in global thermal models. Gur et al [18] conducted a parametric design study to optimise the APU compartment and demonstrated its inclusion in a global model.…”

Section: Introductionmentioning

confidence: 99%