Staggered three-dimensional cavities as a possible method for skin friction drag reduction

Gowree, E. R. and Atkin, C. J. ORCID: https://orcid.org/0000-0003-2529-1978 (2016) Staggered three-dimensional cavities as a possible method for skin friction drag reduction. In: 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016. 30th Congress of the International Council of the Aeronautical Sciences, ICAS 2016 . International Council of the Aeronautical Sciences, KOR. ISBN 9783932182853

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Abstract

The effect of three-dimensional staggered circular cavities on a zero-pressure gradient incompressible turbulent boundary layer was studied. Two key parameters were varied, being the ratio of the diameter, d, to the depth, h, of the cavity, d/h and the Reynolds number based on the diameter of the cavity, Rd. Velocity profile measurements showed that for the cases of d/h>1 an increase in skin friction drag was experienced with respect to a smooth surface, but for d/h ≤ 1 the drag increment was almost negligible and in some cases it was lower than that of a smooth surface by up to 10%. Measurements along the spanwise plane showed the presence of organised transverse velocity components which bear some resemblance with the flow over riblets. The skin friction drag appears to be a strong function of Rd, where for Rd >5500 a drag increment is experienced which could potentially be due to shear layer breakdown and more production of turbulence.

Item Type: Book Section
Uncontrolled Keywords: aerospace engineering,control and systems engineering,electrical and electronic engineering,materials science(all) ,/dk/atira/pure/subjectarea/asjc/2200/2202
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Depositing User: LivePure Connector
Date Deposited: 19 Jul 2022 19:30
Last Modified: 25 Sep 2022 00:05
URI: https://ueaeprints.uea.ac.uk/id/eprint/86666
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