Hostname: page-component-848d4c4894-hfldf Total loading time: 0 Render date: 2024-06-08T03:05:12.197Z Has data issue: false hasContentIssue false
  • English
  • Français

The interaction of a vortex with a boundary layer

Published online by Cambridge University Press:  04 July 2016

C.P. Yeung  and
L.C. Squire
C.P. Yeung
Affiliation:
Cambridge University Engineering Department
L.C. Squire
Affiliation:
Cambridge University Engineering Department
Get access Rights & Permissions [Opens in a new window]

Summary

The three-dimensional vortex/boundary layer interaction of a type which may occur on a high-lift aerofoil has been studied. The experimental configuration simulates the trailing vortex system generated by two differentially-deflected slats which interact with an otherwise two-dimensional boundary layer developed on the wing surface under a nominal zero pressure gradient. The mean and turbulent flowfields are measured by a triple hot-wire system. The measurements show that the trailing vortex system includes the vortex sheets shed from the slats and the single vortex formed at the discontinuity between them. The single vortex moves sideways and interacts with the boundary layer as it develops downstream. During the interaction with the boundary layer, the low momentum, high turbulent-kinetic energy flow carrying negative longitudinal vorticity is entrained from the boundary layer and rolled into the vortex at the line of lateral convergence on the test surface. Likewise, at the line of lateral divergence, the high momentum, low turbulent kinetic energy flow carried by the vortex impinges on the boundary layer, suppressing the turbulent energy level and the growth of the boundary layer.

Type
Research Article
Information
The Aeronautical Journal , Volume 98 , Issue 978 , October 1994 , pp. 311 - 318
Copyright
Copyright © Royal Aeronautical Society 1994 

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

1. Squire, L.C. Interactions between wakes and boundary layers, Prog Aerospace Sci, 1989, 26, pp 261–288.Google Scholar
2. Moghadam, A.H.K. and Squire, L.C. The mixing of three-dimensional turbulent wakes and boundary layers, Aeronaut J, 1989, 93, (5), pp 153–161.Google Scholar
3. Yeung, C.P. and Squire, L.C. Three-dimensional wake and boundary layer interaction. In: Proceedings of Turbulent Shear Flows, 9, Kyoto, 16-18 August 1993.Google Scholar
4. Shabaka, I.M.M.A, Mehta, R.D. and Bradshaw, P. Longitudinal vortices imbedded in turbulent boundary layers. Part 1, single vortex. J Fluid Mech, 1985, 155, pp 37–57.Google Scholar
5. Mehta, R.D. and Bradshaw, P. Longitudinal vortices imbedded in turbulent boundary layers. Part 2. vortex pair with common flow upwards, J Fluid Mech, 1988, 188, pp 529–546.Google Scholar
6. Cutler, A.D. and Bradshaw, P. Strong vortex/boundary layer inter actions. Part I, vortices high, Exp Fluids, 1993, 14, pp 321–332.Google Scholar
7. Cutler, A.D. and Bradshaw, P. Strong vortex/boundary layer inter actions. Part II, vortices low, Exp Fluids, 1993, 14, pp 393–401.Google Scholar
8. Yeung, C.P. and Squire, L.C. Numerical calibration of an orthogonal triple hot-wire probe and its verification tests, Measurement Sci Tech, December 1993, 4.Google Scholar
9. Yeung, C.P. and Squire, L.C. Three-dimensional interaction of wake/boundary-layer and vortex/boundary-layer, Data Report CUED/A-AERO/TR.23, 1993.Google Scholar