Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-03T08:42:17.015Z Has data issue: false hasContentIssue false
  • English
  • Français

Re-Circulating Flows Associated with Two-Dimensional Steps

Published online by Cambridge University Press:  07 June 2016

W.D. Moss  and
S. Baker
W.D. Moss
Affiliation:
Department of Civil Engineering, University of Surrey
S. Baker
Affiliation:
Department of Civil Engineering, University of Surrey
Get access

Summary

This paper describes measurements made in the regions of separated flow associated with three simple sharpedged two-dimensional geometries, a rear-facing step, a front-facing step and a rectangular block. The use of the pulsed-wire anemometer made possible the measurement of the three components of mean velocity and turbulence; earlier techniques, such as the hot-wire anemometer, were not well suited to the accurate determination of these quantities either in regions of continually reversing flows such as the re-circulatory zone or in regions of very high turbulence such as the shear layers bounding these zones. Supplementary measurements of surface pressure and shear stresses are also presented and comparison is made between these shear layers and the plane mixing layer. The work forms the first part of an extended programme for the investigation of bluff body flows but its principal immediate value will probably help in providing data with which to test the validity of mathematical models of turbulence as applied to re-circulating flows.

Type
Research Article
Information
Aeronautical Quarterly , Volume 31 , Issue 3 , August 1980 , pp. 151 - 172
Copyright
Copyright © Royal Aeronautical Society. 1980

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 Etheridge, D.W. and Kemp, P.H., Measurements of turbulent flow downstream of a rearward-facing step. Journal of Fluid Mechanics) Vol. 86, part 3, pp. 545–566, 1978.CrossRefGoogle Scholar
2 Durst, F. and Rastogi, A.K., Theoretical and experimental investigations of turbulent flows with separation. Symposium on Turbulent Shear Flows. Pennsylvania State University, April 1977. Springer-Verlag 1979.Google Scholar
3 Bradbury, L.J.,S. and Castro, I.P., A pulsed-wire technique for velocity measurements in highly turbulent flows. Journal of Fluid Mechanics, Vol. 49, part 4, pp. 657–691, 1971.CrossRefGoogle Scholar
4 Baker, S., Regions of re-circulating flow associated with two-dimensional steps. Ph.D. Thesis. University of Surrey, 1977.Google Scholar
5 Moss, W.D.,, Baker, S.,, and Bradbury, L.J.S., Measurements of mean velocity and Reynolds stresses in some regions of re-circulating flow. Symposium on Turbulent Shear Flows, Pennsylvania State University, April 1977. Springer-Verlag 1979.Google Scholar
6 Brederode, V. and Bradshaw, P., Three-dimensional flow in nominally twodimension separation bubbles. I. Flow behind a rearward-facing step. Imp. College Aero. Rep, 72–19, 1972.Google Scholar
7 Bradbury, L.J.S., Measurements with a pulsed-wire and a hot-wire anemometer in the highly turbulent wake of a normal flat plate. Journal of Fluid Mechanics, Vol. 77, part 3, pp. 473–497, 1976.Google Scholar
8 Ota, T. and Itasaka, M., A separated and re-attached flow on a blunt flat plate. Journal of Fluids Engineering, Transaction of American Society of Mechanical Engineers, pp. 79–86, 1976.Google Scholar
9 Narayanan, M.A.B.,, Khadgi, Y.N. and Viswanath, P.R., Similarities in pressure distribution in separated flow behind backward-facing steps. Aeronautical Quarterly, Vol. 25, pp. 305–312, 1974.Google Scholar
10 Tani, I.,, Iuchi, M. and Komoda, H., Experimental investigation of flow separation associated with a step or a groove. Aeronautical Research Institute, University of Tokyo, Research Report No. 364, p. 119, 1961.Google Scholar
11 Roshko, A. and Lau, J.C., Some observations on transition and reattachment of a free shear layer in compressible flow. Proceedings of 1965 Heat Transfer and Fluid Mechanics, Stanford university Press, 1965.Google Scholar
12 Bradshaw, P. and Wong, F.Y.F., The re-attachment and relaxation of a turbulent shear layer. Journal of Fluid Mechanics, Vol. 52, Part 1, pp. 113–135, 1972.Google Scholar
13 Champagne, F.H.,, Pao, Y.H. and Wygnanski, I.J., On the two-dimensional mixing region. Journal of Fluid Mechanics, Vol. 74, Part 2, pp. 209–250, 1976.Google Scholar
14 Wygnanski, I.J. and Fiedler, H.E., The two-dimensional mixing region. Journal of Fluid Mechanics, Vol. 41, Part 2, pp. 327–361, 1970.Google Scholar
15 Bradshaw, P., The understanding and prediction of turbulent flow. Aeronautical Journal, Vol. 76, pp. 403–418, 1972.Google Scholar