Ventilation considerations for an enhanced thermal risk prediction in aircraft conceptual design

Sanchez, Florian; Huzaifa, Abdul Malik; Liscouët-Hanke, Susan

doi:10.1016/j.ast.2020.106401

Cited by 19 publications

(10 citation statements)

References 9 publications

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“…Notice that the geometry of this equipment bay has been simplified and is depicted in Figure 2. This study considers three systems similar to those used in previous work [12,13]. The first system is analogous to a High Voltage Power Supply (HVPS) with a heat load of 1000 W. Whereas System 2 and System 3 are assumed to be systems of the type "5 MCU" (Modular Concept Units) and type "3 MCU" with heat loads of 600 W and 1000 W, respectively.…”

Section: Description Of the Cockpit-underfloor Avionics Bay (Configur...mentioning

confidence: 99%

“…Sanchez et al [11] formulated the need for a multi-level approach to improving thermal analysis throughout the development process of future aircraft to meet the need to introduce thermal analysis earlier in the development cycle. In particular, the authors developed a so-called thermal risk assessment (TRA) methodology suitable for conceptual design [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…The prior work shows a knowledge gap for the thermal interactions occurring in typical tightly packed aircraft equipment bays. In particular, system thermal interactions, such as radiation, may play a more significant role in tightly packaged avionics bays [13,14]. In addition, mixed convection regime exists when the equipment bay's ventilation flow rate is not strong enough to compete against buoyancy effects.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Description Of the Cockpit-underfloor Avionics Bay (Configur...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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 first level is the aircraft zone level, including ventilation and temperature stratification predictions of the zone under study. The second part of the approach covers three system-level aspects: The mainstream flow analysis to predict the closeness of a system with regards to the considered ventilation source (discussed in more detail in [34]), the system integration analysis that focuses on the system locations in the bay, the assessment of the thermal interactions between a system and the zone, and the other systems, and the system-level aspects related to the system requirements, derived from standards such as RTCA DO-160G or SAE AIR1168/6A.…”

Section: A Disciplinary Capabilitiesmentioning

confidence: 99%

“…The authors estimated the required mass flow rate to extract the heat loads dissipated by the avionics while keeping the avionics environment below 60 degrees Celsius. Since the locations of the ventilation sources depend on the airframe definition and the OBS layout, the authors used the pySyTher tool to evaluate the influence of the location of the ventilation sources on the avionics thermal risk [34]. Therefore, the preliminary thermal risk analyses enabled finding the optimal location of the inlet and outlet flow sources to minimize OBS thermal risks (Fig.…”

Section: Thermal Risk Analysis Of the Avionics Baymentioning

confidence: 99%

An MBSE Certification-Driven Design of a UAV MALE Configuration in the AGILE 4.0 Design Environment

Torrigiani

Deinert

Fioriti

et al. 2021

Aiaa Aviation 2021 Forum

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This paper presents a certification-driven design process for an Unmanned Medium-Altitude-Long-Endurance (UAV MALE) air vehicle, including on-board system design and placements, electro-magnetic compatibility analysis, and thermal risk assessments. In literature, the preliminary aircraft design phase is mainly driven by mission performances and structural integrity aspects. However, the inclusion of other disciplines, like on-board system design or electro-magnetic compatibility, or thermal analysis, can lead to more efficient and costeffective solutions and becomes paramount for non-conventional configurations like unmanned vehicles or highly electrified platforms. In the EC-funded AGILE 4.0 project (2019-2022), the traditional scope of the preliminary aircraft design is extended by including domains that are usually considered only in later design phases, such as certification, production and maintenance. In this paper, the AGILE 4.0 design environment supports the definition and execution of a certification-driven design process of a UAV MALE configuration, using a Model-Based Systems Engineering (MBSE) approach.

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Liebisch

2024

Mechanics and Adaptronics

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Ventilation considerations for an enhanced thermal risk prediction in aircraft conceptual design

Cited by 19 publications

References 9 publications

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

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

An MBSE Certification-Driven Design of a UAV MALE Configuration in the AGILE 4.0 Design Environment

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