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dc.contributor.authorColes, C
dc.contributor.authorBabinsky, Holger
dc.contributor.authorPlatt, E
dc.contributor.authorSheaf, C
dc.date.accessioned2018-12-11T00:30:38Z
dc.date.available2018-12-11T00:30:38Z
dc.date.issued2018-01-08
dc.identifier.isbn9781624105241
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286609
dc.description.abstract© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. Shock Wave-Boundary-Layer Interactions, or SBLI’s, are known to form on engine inlets within a complex transonic flow-field during typical take-off and climb configurations. On the engine inlet, there are a number of potential sources of surface roughness, such as novel de-icing and acoustic systems, or surface contamination. The impact on the flow-field structure, as a result of this roughness, may lead to detrimental side effects, such as losses in engine efficiency or intake flow stability. Previous research into two-dimensional roughness shapes demonstrated flow-field changes, for example a thicker downstream-boundary layer compared to a smooth surface. This paper compares the impact of a two-dimensional ridge roughness to a three-dimensional cubed roughness on the inlet flow-field. The effect of these rough surfaces is examined with schlieren photography and Laser Doppler Velocime-try (LDV) techniques. At an on-design condition, a rough surface promotes a smaller supersonic region, and a thicker boundary-layer downstream of the interaction compared to a smooth surface. At off-design upper surface mass flow rate conditions, modelling a higher mass flow engine demand, the supersonic region grows, leading to a shock location further downstream. Under these conditions, roughness also promotes a thicker downstream boundary-layer. However, comparing the two-dimensional with three-dimensional roughness at an approximate fan-face location, shows that three-dimensional roughness is more benign for all off-design cases. This suggests that the topology of the roughness is influencing the condition of the boundary-layer at this location.
dc.publisherAmerican Institute of Aeronautics and Astronautics
dc.titleThe impact of surface roughness geometry on aero-engine intakes at incidence
dc.typeConference Object
prism.issueIdentifier210059
prism.publicationDate2018
prism.publicationNameAIAA Aerospace Sciences Meeting, 2018
dc.identifier.doi10.17863/CAM.33921
dcterms.dateAccepted2017-08-25
rioxxterms.versionofrecord10.2514/6.2018-1516
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-01-01
dc.contributor.orcidBabinsky, Holger [0000-0002-7647-7126]
rioxxterms.typeConference Paper/Proceeding/Abstract
cam.issuedOnline2018-01-07
pubs.conference-name2018 AIAA Aerospace Sciences Meeting
rioxxterms.freetoread.startdate2019-01-01


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