Passive transonic shock control on bump flow for wing buffet suppression

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dc.contributor.authorDi Pasquale, Davide
dc.contributor.authorPrince, Simon
dc.date.accessioned2023-06-23T15:15:51Z
dc.date.available2023-06-23T15:15:51Z
dc.date.issued2023-06-20
dc.description.abstractSince modern transport aircraft cruise at transonic speeds, shock buffet alleviation is one indispensable challenge that civil transport research needs to be addressed. Indeed, in the transonic flow regime shock-induced separation and transonic buffet compromise the flight envelope of an aircraft, and therefore its operational safety and structural integrity. One possible solution is to control and delay the boundary layer separation. The aim of this work was to study whether sub-boundary layer scale period roughness, which locally increases the boundary layer displacement thickness, can act as a virtual shock bump, with aim of bifurcating the foot of the shock wave to reduce the shock’s adverse effect on the boundary layer in the same way as solid shock bumps are known to act. This passive approach can then enhance the buffet margin, consequently extending the safe flight envelope. An experimental investigation was performed, applying this passive technique on a wind tunnel wall bump model which simulated the flow over the upper surface of an aerofoil. The results, in terms of surface pressure distribution and corresponding shadowgraph flow visualisation, showed that such periodic roughness can, indeed, bifurcate the shock wave and delay shock-induced separations, depending on the orientation of the roughness and its periodicity. A virtual shock bump effect can be produced using the displacement effect of periodic sub-boundary layer scale roughness.en_UK
dc.identifier.citationDi Pasquale D, Prince S. (2023) Passive transonic shock control on bump flow for wing buffet suppression. Aerospace, Volume 10, Issue 6, June 2023, Article number 569en_UK
dc.identifier.issn2226-4310
dc.identifier.urihttps://doi.org/10.3390/aerospace10060569
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/19885
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjecttransonic aerodynamicsen_UK
dc.subjectshock wave boundary layer interactionen_UK
dc.subjectpassive flow controlen_UK
dc.subjectsurface roughnessen_UK
dc.subjectbuffet alleviationen_UK
dc.subjectexperimenten_UK
dc.titlePassive transonic shock control on bump flow for wing buffet suppressionen_UK
dc.typeArticleen_UK

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