Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-20T06:16:12.001Z Has data issue: false hasContentIssue false
  • English
  • Français

Characteristics of a trailing-edge flow with turbulent boundary-layer separation

Published online by Cambridge University Press:  20 April 2006

B. E. Thompson  and
J. H. Whitelaw
B. E. Thompson
Affiliation:
Imperial College of Science and Technology, Department of Mechanical Engineering, Fluids Section, London SW7 2BX
J. H. Whitelaw
Affiliation:
Imperial College of Science and Technology, Department of Mechanical Engineering, Fluids Section, London SW7 2BX
Get access Rights & Permissions [Opens in a new window]

Abstract

Experimental techniques, including flying-hot-wire anemometry, have been used to determine the pressure and velocity characteristics of a flow designed to simulate the trailing-edge region of an airfoil at high angle of attack. Emphasis is placed on the region of recirculating flow and on the downstream wake. It is shown that the effect of this recirculation is large even though the details of the flow within it may be unimportant. Normal stresses and cross-stream pressure gradients are important immediately upstream and downstream of the recirculating flow and are associated with strong streamline curvature. The relative importance of the terms in the transport equations for mean momentum and turbulence energy are quantified and the implications for procedures which solve potential-flow and boundary-layer equations and for alternative calculation methods are discussed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 157 , August 1985 , pp. 305 - 326
Copyright
© 1985 Cambridge University Press

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Adair D., Thompson, B. E. & Whitelaw J. H.1984 Measurements and calculations of a separating boundary layer and the downstream wake. Numerical and Physical Aspects of Aerodynamic Flows II (ed. T. Cebeci), p. 97. Springer-Verlag.
Cebeci T., Stewartson, K. & Whitelaw J. H.1984 Calculation of two-dimensional flow past airfoils. Numerical and Physical Aspects of Aerodynamic Flows II (ed. T. Cebeci), p. 1. Springer-Verlag.
Cole, D. E. & Wadcock A. J.1979 Flying-hot-wire study of flow past an NACA 4412 airfoil at maximum lift. AIAA J 17, 321.Google Scholar
Gillis, J. C. & Johnston J. P.1983 Turbulent boundary-layer flow and structure on a convex wall and its development on a flat wall. J. Fluid Mech. 135, 123.Google Scholar
Hah, C. & Lakshminarayana B.1982 Measurement and prediction of mean velocity and turbulence structure in the near wake of an airfoil. J. Fluid Mech. 115, 251.Google Scholar
Hastings, R. C. & Moreton K. G.1982 An investigation of a separating equilibrium turbulent boundary layer. Proc. Intl Sym. Applications of Laser-Doppler Anemometry to Fluid Mech. Lisbon, Portugal. Paper 11.Google Scholar
Hoffman, P. H. & Bradshaw P.1978 Turbulent boundary layers on surfaces of mild longitudinal curvature. Imp. College Aero Report 78-04.Google Scholar
Mcdonald, H. & Briley W. R.1984 A survey of recent work on interacted boundary-layer theory for flow with separation. Numerical and Physical Aspects of Aerodynamic Flows II (ed. T. Cebeci), p. 141. Springer-Verlag.
Nakayama A.1984 Measurements of attached and separated turbulent flows in the trailing-edge region of airfoils. Numerical and Physical Aspects of Aerodynamic Flows II (ed. T. Cebeci), p. 233. Springer-Verlag.
Simpson R. J., Chew, Y. T. & Sivaprasad B. G. P.1981 The structure of a separating turbulent boundary layer. J. Fluid Mech. 113, 23.Google Scholar
So, R. M. C. & Mellor G. L.1973 Experiment on convex curvature effects in turbulent boundary layers. J. Fluid Mech. 60, 43.Google Scholar
Thompson B. E.1984 The turbulent separating boundary layer and downstream wake. Ph.D. Thesis, University of London.
Thompson, B. E. & Whitelaw J. H.1982 A turbulent boundary layer approaching separation. Walz-Festschrift Volume, p. 253. Springer-Verlag.
Thompson, B. E. & Whitelaw J. H.1984 Flying hot-wire anemometry. Exp. in Fluids 2, 47.Google Scholar
Viswanath, P. R. & Brown J. L.1983 Separating trailing-edge flow at a transonic Mach number. AIAA J. 21, 801.Google Scholar