Characteristics of boundary-layer transition and Reynolds-number sensitivity of three-dimensional wings of varying complexity operating in ground effect

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dc.contributor.authorRoberts, Luke S.
dc.contributor.authorFinnis, Mark V.
dc.contributor.authorKnowles, Kevin
dc.date.accessioned2016-10-31T15:23:03Z
dc.date.available2016-10-31T15:23:03Z
dc.date.issued2016-06-03
dc.description.abstractThe influence of Reynolds number on the aerodynamic characteristics of various wing geometries was investigated through wind-tunnel experimentation. The test models represented racing car front wings of varying complexity: from a simple single-element wing to a highly complex 2009-specification formula-one wing. The aim was to investigate the influence of boundary-layer transition and Reynolds-number dependency of each wing configuration. The single-element wing showed significant Reynolds-number dependency, with up to 320% and 35% difference in downforce and drag, respectively, for a chordwise Reynolds number difference of 0.81 × 105. Across the same test range, the multi-element configuration of the same wing and the F1 wing displayed less than 6% difference in downforce and drag. Surface-flow visualization conducted at various Reynolds numbers and ground clearances showed that the separation bubble that forms on the suction surface of the wing changes in both size and location. As Reynolds number decreased, the bubble moved upstream and increased in size, while reducing ground clearance caused the bubble to move upstream and decrease in size. The fundamental characteristics of boundary layer transition on the front wing of a monoposto racing car have been established.en_UK
dc.identifier.citationRoberts LS, Finnis MV, Knowles K. Characteristics of Boundary-Layer Transition and Reynolds-Number Sensitivity of Three-Dimensional Wings of Varying Complexity Operating in Ground Effect. ASME. Journal Fluids Engineering. 2016, 138(9):091106en_UK
dc.identifier.cris15380714
dc.identifier.urihttps://doi.org/10.1115/1.4033299
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10911
dc.publisherAmerican Society of Mechanical Engineersen_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleCharacteristics of boundary-layer transition and Reynolds-number sensitivity of three-dimensional wings of varying complexity operating in ground effecten_UK
dc.typeArticleen_UK

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