Characteristics of shock-induced boundary-layer separation on nacelles under windmilling diversion conditions

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dc.contributor.authorBoscagli, Luca
dc.contributor.authorMacManus, David
dc.contributor.authorTejero, Fernando
dc.contributor.authorSabnis, Kshitij
dc.contributor.authorBabinsky, H.
dc.contributor.authorSheaf, Christopher T.
dc.date.accessioned2023-11-02T15:23:47Z
dc.date.available2023-11-02T15:23:47Z
dc.date.issued2023-11-02
dc.description.abstractThe boundary layer on the external cowl of an aeroengine nacelle under windmilling diversion conditions is subjected to a notable adverse pressure gradient due to the interaction with a near-normal shock wave. Within the context of computational fluid dynamics (CFD) methods, the correct representation of the characteristics of the boundary layer is a major challenge in capturing the onset of the separation. This is important for the aerodynamic design of the nacelle, as it may assist in the characterization of candidate designs. This work uses experimental data obtained from a quasi-2D rig configuration to provide an assessment of the CFD methods typically used within an industrial context. A range of operating conditions are investigated to assess the sensitivity of the boundary layer to changes in inlet Mach number and mass flow through a notional windmilling engine. Fully turbulent and transitional boundary-layer computations are used to determine the characteristics of the boundary layer and the interaction with the shock on the nacelle cowl. The correlation between the onset of shock-induced boundary-layer separation and the preshock Mach number is assessed, and it was found that the CFD is able to discern the onset of boundary-layer separation.en_UK
dc.identifier.citationBoscagli L, MacManus D, Tejero F, et al., (2024) Characteristics of shock-induced boundary-layer separation on nacelles under windmilling diversion conditions. AIAA Journal, Volume 62, Issue 1, January 2024, pp. 79-91en_UK
dc.identifier.issn0001-1452
dc.identifier.urihttps://doi.org/10.2514/1.J063209
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/20500
dc.language.isoenen_UK
dc.publisherAIAAen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleCharacteristics of shock-induced boundary-layer separation on nacelles under windmilling diversion conditionsen_UK
dc.typeArticleen_UK

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