Impact of installation on the performance of a civil turbofan exhaust at wind-milling: a combined experimental and numerical approach

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dc.contributor.authorGoulos, Ioannis
dc.contributor.authorMacManus, David
dc.contributor.authorHueso Rebassa, Josep
dc.contributor.authorAlderman, James
dc.contributor.authorSheaf, Christopher
dc.date.accessioned2025-02-05T09:51:48Z
dc.date.available2025-02-05T09:51:48Z
dc.date.freetoread2025-02-05
dc.date.issued2025-03
dc.date.pubOnline2025-01-22
dc.description.abstractThis work presents a combined experimental and numerical investigation of the effect of wing integration on the aerodynamic behaviour of a typical large civil aero-engine exhaust at wind-milling conditions. Engine performance simulations established estimates of Fan and Core Nozzle Pressure Ratios (FNPR and CNPR, respectively) for representative “engine-out” wind-milling scenarios. The experimental data and Reynolds Averaged Navier Stokes (RANS) Computational Fluid Dynamic (CFD) simulations encompassed End of Runway (EoR) take-off, diversion, and cruise wind-milling conditions for both isolated and installed configurations. The impact of FNPR, CNPR, free-stream Mach number (M∞), and high-lift surfaces on the installed suppression effect were evaluated. The measured and CFD predicted fan and core nozzle maps were implemented into the engine performance model to estimate the engine re-matching characteristics due to the impact of the installation, and the effect on engine mass flow. The effect of installation can reduce the fan and core nozzle discharge coefficients by up to 13% and 26%, respectively, relative to the isolated configuration for representative EOR wind-milling conditions. RANS CFD captures the effect of suppression on both the fan and core with an accuracy between 0.1% and 1.2%, depending on Mach number, which is sufficient for industrial design and analysis purposes. The engine performance analyses showed that the installed suppression effect can result in a 10% reduction of engine mass flow at EOR wind-milling. Within the context of nacelle design under wind-milling, this effect of exhaust suppression must be considered in determining the intake Mass Flow Capture Ratio (MFCR).
dc.description.journalNameAerospace Science and Technology
dc.description.sponsorshipThis project has received funding from the Clean Sky 2 Joint Undertaking (JU) under grant agreement number 101007598.
dc.identifier.citationGoulos I, MacManus D, Hueso Rebassa J, et al., (2025) Impact of installation on the performance of a civil turbofan exhaust at wind-milling: a combined experimental and numerical approach. Aerospace Science and Technology, Volume 158, March 2025, Article number 109883
dc.identifier.elementsID560680
dc.identifier.issn1270-9638
dc.identifier.paperNo109883
dc.identifier.urihttps://doi.org/10.1016/j.ast.2024.109883
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23454
dc.identifier.volumeNo158
dc.languageEnglish
dc.language.isoen
dc.publisherElsevier
dc.publisher.urihttps://www.sciencedirect.com/science/article/pii/S1270963824010125?via%3Dihub
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subject4012 Fluid Mechanics and Thermal Engineering
dc.subject40 Engineering
dc.subject4001 Aerospace Engineering
dc.subjectGeneric health relevance
dc.subject7 Affordable and Clean Energy
dc.subjectAerospace & Aeronautics
dc.subject4001 Aerospace engineering
dc.subjectAerospace
dc.subjectTurbofan
dc.subjectAerodynamics
dc.subjectComputational fluid dynamics
dc.subjectInstallation propulsion
dc.subjectIntegration
dc.subjectWind-milling
dc.subjectExhaust
dc.titleImpact of installation on the performance of a civil turbofan exhaust at wind-milling: a combined experimental and numerical approach
dc.typeArticle
dcterms.dateAccepted2024-12-15

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