Unsteady flow interactions and ground plane proximity in a coupled compact intake-fan in crosswind

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dc.contributor.authorLobuono, Luca
dc.contributor.authorMacManus, David G.
dc.contributor.authorHueso Rebassa, Josep
dc.contributor.authorChristie, Robert
dc.date.accessioned2025-04-17T12:21:24Z
dc.date.available2025-04-17T12:21:24Z
dc.date.freetoread2025-04-17
dc.date.issued2025-04-01
dc.date.pubOnline2025-04-01
dc.description.abstractThe assessment of the crosswind flow separation mechanisms and resulting distortion for compact intakes can be a key contributor for the design of viable large civil aeroengines. Under crosswind conditions, the intake aerodynamics are strongly influenced by both the fan and the ground plane. However, the impact of key design parameters, such as ground clearance, on the intake flow distortion is not fully understood. This study investigates the effects of a large variation in ground clearance on the intake-fan unsteady aerodynamics using an Unsteady Reynolds-Averaged Navier-Stokes fully coupled with a rotating fan stage. The work includes an assessment of the unsteady swirl distortion and the unsteady peak distortion events. The findings show that increased ground clearance can have adverse effects for the considered compact intake design. Gross separation can occur at lower crosswind velocities and arise at the intake lower section due to mass flow redistribution. When the ground clearance is increased, the gross separation on the windward side of the intake occurs at a greater crosswind velocity but exhibits greater levels of unsteady intake flow distortion. Overall, intake designs should be assessed at the expected ground clearance as the distortion and the onset of separation can vary substantially.
dc.description.conferencename59th 3AF International Conference on Applied Aerodynamics
dc.description.sponsorshipL. Lobuono was supported by the Engineering and Physical Sciences Research Council [grant number EP/W524529/1], Rolls Royce plc., and Cranfield University. D. MacManus and R. Christie were partially funded by Innovate UK ATI FANFARE project (Ref: 113286).
dc.identifier.citationLobuono L, MacManus D, Hueso Rebassa J, Christie R. (2025) Unsteady flow interactions and ground plane proximity in a coupled compact intake-fan in crosswind. In: 59th 3AF International Conference on Applied Aerodynamics, 24 - 26 Mar 2025, Strasbourg, France
dc.identifier.elementsID567415
dc.identifier.urihttps://doi.org/10.60711/aero2025.20250401.8402130248130544
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/23798
dc.language.isoen
dc.publisherAssociation AĆ©ronautique et Astronautique de France (3AF)
dc.publisher.urihttps://www.3af-aerodynamics.com/
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAerodynamics
dc.subjectCrosswind
dc.subjectFan
dc.subjectGround effect
dc.subjectIntake
dc.subjectUnsteady
dc.titleUnsteady flow interactions and ground plane proximity in a coupled compact intake-fan in crosswind
dc.typeConference paper
dcterms.coverageStrasbourg, France
dcterms.temporal.endDate26 Mar 2025
dcterms.temporal.startDate24 Mar 2025

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