Experimental investigation of the flow structures over a 40° swept wing

Shanying Zhang, Artur J. Jaworski, S.C. McParlin, John T. Turner

Research output: Contribution to journalArticle

Abstract

Flow over a moderately swept wing is characterised by complex localised flow vortex topologies such as ‘closed’ separation bubbles or ‘open’ separation structures. A model of a complex cambered, twisted, tapered wing with 40° leading edge sweep, representative of those designed for manoeuvre at high subsonic Mach numbers, was investigated using the oil-film visualisation, stereo particle image velocimetry and force moment measurements. Wind-tunnel tests were conducted at a range of Reynolds number from 2.1×105 to 8.4×105 and at angles of incidence from −1° to 22°. Still images combined with video clips enable flow patterns over the wing model to be interpreted more clearly and accurately. Using successive images extracted from the video of flow visualisation, the movement of the oil pigment has been estimated. The influence of the Reynolds number and incidence angle was discussed through analysing the flow pattern over the wing surface. Additionally, the link between the flow structures present and the wing aerodynamic performance was studied.
Original languageEnglish
Pages (from-to)39-55
Number of pages17
JournalAeronautical Journal
Volume123
Issue number1259
DOIs
Publication statusPublished - 27 Feb 2019

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Swept wings
Flow structure
Flow patterns
Reynolds number
Flow visualization
Pigments
Velocity measurement
Mach number
Wind tunnels
Aerodynamics
Vortex flow
Visualization
Topology
Oils

Cite this

Zhang, Shanying ; Jaworski, Artur J. ; McParlin, S.C. ; Turner, John T. / Experimental investigation of the flow structures over a 40° swept wing. In: Aeronautical Journal. 2019 ; Vol. 123, No. 1259. pp. 39-55.
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Experimental investigation of the flow structures over a 40° swept wing. / Zhang, Shanying; Jaworski, Artur J.; McParlin, S.C.; Turner, John T.

In: Aeronautical Journal, Vol. 123, No. 1259, 27.02.2019, p. 39-55.

Research output: Contribution to journalArticle

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