The structure of a supersonic turbulent boundary layer subjected to concave surface curvature

This paper reports an experimental investigation of the instantaneous structure of a supersonic turbulent boundary layer (M = 2.86, Reθ = 82000) over a short region of longitudinal concave surface curvature. The radius of curvature was 12 initial boundary-layer thicknesses and the turning angle was...

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Bibliographic Details
Published in:Journal of fluid mechanics 1994-01, Vol.259, p.1-24
Main Authors: Donovan, John F., Spina, Eric F., Smits, Alexander J.
Format: Article
Language:English
Subjects:
Boundary layer and shear turbulence
Compressible flows
shock and detonation phenomena
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Physics
Supersonic and hypersonic flows
Turbulent flows, convection, and heat transfer
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Summary:This paper reports an experimental investigation of the instantaneous structure of a supersonic turbulent boundary layer (M = 2.86, Reθ = 82000) over a short region of longitudinal concave surface curvature. The radius of curvature was 12 initial boundary-layer thicknesses and the turning angle was 16°. Severe distortion of the boundary layer occurred, as evidenced by an alteration of the mean velocity profiles and an increase in wall shear stress of 125%. The large-scale organized motions in the boundary layer were significantly altered as illustrated by changes in the character of the mass flux ‘fronts’ (large gradients in the fluctuating streamwise mass flux).
ISSN:0022-1120
1469-7645
DOI:10.1017/S0022112094000017