Hostname: page-component-76fb5796d-wq484 Total loading time: 0 Render date: 2024-04-25T07:58:40.434Z Has data issue: false hasContentIssue false
  • English
  • Français

Grid turbulence near a moving wall

Published online by Cambridge University Press:  12 April 2006

N. H. Thomas  and
P. E. Hancock
N. H. Thomas
Affiliation:
Department of Aeronautics, Imperial College, London Present address: Department of Applied Mathematics and Theoretical Physics, University of Cambridge.
P. E. Hancock
Affiliation:
Department of Aeronautics, Imperial College, London
Get access Rights & Permissions [Opens in a new window]

Abstract

Decaying grid turbulence was passed over a wall moving at the stream speed. For the high Reynolds number of the experiment, the field due to the wall constraint on the normal component of the velocity fluctuations is found to extend further into the flow than the influence of the viscous boundary condition on the tangential-component fluctuations. Measurements of the variances, length scales and spectra of the three velocity components of the turbulence are compared with the results of a previous experiment and with the theoretical predictions for an idealization of the flow. A simple model for some departures from the theory is proposed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 82 , Issue 3 , 27 September 1977 , pp. 481 - 496
Copyright
© 1977 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

Bradshaw, P. 1974 Effects of free-stream turbulence on turbulent shear layers. Imperial College Aero. Rep. no. 74–10.Google Scholar
Comte-Bellot, G. & Corrsin, S. 1966 The use of a contraction to improve the isotropy of grid-generated turbulence. J. Fluid Mech. 25, 657.Google Scholar
Davies, M. E. 1974 Spectral analysis programs Powspec and Cophase. Imperial College Aero. Tech. Note no. 74–103.Google Scholar
Graham, J. M. R. 1975 Turbulent flow past a long flat plate. Imperial College Aero. Tech. Note no. 75–101.Google Scholar
Green, J. E. 1972 On the influence of free stream turbulence on a turbulent boundary layer as it relates to wind tunnel testing at subsonic speeds. R.A.E. Tech. Rep. no. 72201.Google Scholar
Hancock, P. E. & Thomas, N. H. 1977 Grid turbulence near a moving wall. Imperial College Aero. Note (to be published).
Hunt, J. C. R. & Graham, J. M. R. 1978 Free-stream turbulence near plane boundaries. To be published.
Naudascher, E. & Farell, C. 1970 Unified analysis of grid turbulence. Trans. A.S.C.E. 96 (EM2), 121.Google Scholar
Uzkan, T. & Reynolds, W. C. 1967 A shear-free turbulent boundary layer. J. Fluid Mech. 28, 803.Google Scholar