Numerical investigation of the heat transfer in an Aeronautical Composite Material under Fire Stress

Autor: Khaled Chetehouna, S. Senave, N. Grange, Nicolas Gascoin
Přispěvatelé: Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Daher, GRANGE, Nathan
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Engineering
Work (thermodynamics)
General Physics and Astronomy
Mechanical engineering
[SPI.MECA.MEFL] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
02 engineering and technology
Computational fluid dynamics
01 natural sciences
010305 fluids & plasmas
[SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Stress (mechanics)
Benchmark of turbulence models
0103 physical sciences
Fireproof tests
Calibration
General Materials Science
Composite material
Carbon–phenolic composite
Safety
Risk
Reliability and Quality
[SPI.MECA.THER] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]
Turbulence
business.industry
General Chemistry
021001 nanoscience & nanotechnology
Aircraft certification
Auxiliary power unit
Heat transfer
Thermal degradation
[SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]
Electric power
0210 nano-technology
business
Zdroj: Fire Safety Journal
Fire Safety Journal, Elsevier, 2016, pp.56-63
ISSN: 0379-7112
Popis: International audience; abstractThe use of composite materials for aeronautical applications has been growing since several years be- cause of the opportunity to produce lightweight structures reducing the fuel bills and emissions. The need for fireproof certification imposes costly and time consuming experiments that might be replaced or complemented in the years to come by numerical calculations. The present work creates a CFD nu- merical model of a fireproof test. As an example, a composite part located in an aircraft APU (auxiliary power unit) which provides electric power to the aircraft is investigated. A numerical calibration of the flame is conducted according to the fireproof standards. After that, a comparison between three different turbulence models shows that the k–ε realisable turbulence model is the more suitable for fireproof numerical tests with discrepancies lower than 16% between computed values and measured ones. The influence of an internal air jet is observed for velocities from 1 to 10 m/s. The results demonstrate a good evaluation on how this could reduce the wall temperatures and ensure the requirements of the certi- fication rules compare to the actual external thermal protection used to ensure the certification re- quirements. Indeed, final temperature reductions up to 45% are found at reference point on the structure with the highest value of air jet velocity.
Databáze: OpenAIRE
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