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Step-induced separation of a turbulent boundary layer in incompressible flow

Published online by Cambridge University Press:  28 March 2006

P. Bradshaw  and
P. V. Galea
P. Bradshaw
Affiliation:
Aerodynamics Division, National Physical Laboratory
P. V. Galea
Affiliation:
Aerodynamics Division, National Physical Laboratory
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Abstract

Measurements of the low-speed flow up a step of height equal to 1·75 times the initial boundary-layer thickness show that the flow satisfies Stratford's (1959) condition for rapid separation, the extra stress gradients being confined to the first one-eighth of the boundary-layer thickness. The increase in turbulence intensity up to separation is small, and attributable to low-frequency fluctuations in separation position. Townsend's (1962) criterion predicts the separation point fairly accurately. A simple expression is found for the additional pressure rise that can be withstood by a boundary layer already fairly near separation, which gives tolerable results at any point in the flow up a step.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 27 , Issue 1 , 11 January 1967 , pp. 111 - 130
Copyright
© 1967 Cambridge University Press

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References

Barnes, C. S. 1965 ARC (unpublished) 26 677.
Bradshaw, P. 1964 NPL Aero. Rep. no. 1091.
Bradshaw, P., Ferris, D. H. & Atwell, N. P. 1966 NPL Aero. Rep. no. 1182.
Chapman, D. R., Kuehn, D. M. & Larson, H. K. 1958 NACA Rep. no. 1356.
Goldschmied, F. R. 1965 J. Aircr. 2, 108.
Head, M. R. & Rechenberg, I. 1962 J. Fluid Mech. 14, 1.
Kistler, A. L. 1964 J. Acoust. Soc. Amer. 36, 543.
Klebanoff, P. S. 1955 NACA Rep. no. 1247.
Lighthill, M. J. 1953 Proc. Roy. Soc. A, 217, 1130.
Ludwieg, H. & Tillman, W. 1950 Nat. Adv. Comm. Aero. (Wash.) Tech. Memo. 1285.
Mellor, G. L. 1966 J. Fluid Mech. 24, 255.
Nash, J. F. 1965 NPL Aero. Rep. no. 1137.
Newman, B. G. 1951 Aust. Adv. Comm. Aero. Rep. no. 53.
Schubauer, G. B. & Klebanoff, P. S. 1951 NACA Rep. no. 1030.
Stratford, B. S. 1954 ARC R & M no. 3002.
Stratford, B. S. 1959 J. Fluid Mech. 5, 1.
Taulbee, D. B. 1964 Ph.D. Thesis, Univ. of Illinois.
Townsend, A. A. 1960 J. Fluid Mech. 8, 143.
Townsend, A. A. 1961 J. Fluid Mech. 11, 97.
Townsend, A. A. 1962 J. Fluid Mech. 12, 532.