Skin friction drag reduction over staggered three dimensional cavities

Gowree, Erwin R., Jagadeesh, Chetan and Atkin, Chris ORCID: https://orcid.org/0000-0003-2529-1978 (2019) Skin friction drag reduction over staggered three dimensional cavities. Aerospace Science and Technology, 84. pp. 520-529.

[thumbnail of 2019 AS&T Cavities]
Preview
PDF (2019 AS&T Cavities) - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

Download (732kB) | Preview

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: Article
Faculty \ School: Faculty of Science > School of Engineering (former - to 2024)
UEA Research Groups: Faculty of Science > Research Groups > Fluids & Structures
Faculty of Science > Research Groups > Sustainable Energy
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 30 May 2020 00:12
Last Modified: 07 Nov 2024 12:42
URI: https://ueaeprints.uea.ac.uk/id/eprint/75404
DOI: 10.1016/j.ast.2018.11.001

Downloads

Downloads per month over past year

Actions (login required)

View Item View Item