Hostname: page-component-78c5997874-ndw9j Total loading time: 0 Render date: 2024-11-05T03:17:48.363Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Base Bleed on a Periodic Wake

Published online by Cambridge University Press:  04 July 2016

C. J. Wood
C. J. Wood*
Affiliation:
Department of Engineering Science, University of Oxford
Get access Rights & Permissions [Opens in a new window]

Summary:—

Measurements of profile drag, base pressure, wake turbulence and vortex shedding frequency have been made on a 9 per cent thick aerofoil in the presence of a secondary air flow, ejected from the blunt trailing edge. It is shown that the decrease in profile drag caused by the base bleed is associated with a decrease in the strength of the vortex street. The initial formation of the vortices occurs further downstream as the bleed quantity is increased. As a result, a greater proportion of the shed vorticity is diffused before the street is formed.

Type
Technical notes
Information
The Aeronautical Journal , Volume 68 , Issue 643 , July 1964 , pp. 477 - 482
Copyright
Copyright © Royal Aeronautical Society 1964

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. Holder, D. W., Pearcey, H. H. and Nash, J. F. Some Aerodynamic Advantages of Thick Trailing Edges in High Speed Flight. To be published. Google Scholar
2. Nash, J. F. A Review of Research on Two-Dimensional Base Flow. A.R.C. 23 649. FM 3171.Google Scholar
3. Roshko, A. On the Drag and Shedding Frequency of Two-Dimensional Bluff Bodies.Google Scholar
4. Wood, C. J. An Interim Note on Two-Dimensional Base Bleed. A.R.C. 24 361. Unpublished.Google Scholar
5. Prandtl, L. and Tietjens, O. G. Applied Hydro- and Aerodynamics, Art. 79–82, McGraw-Hill, 1934.Google Scholar
6. Bearman, P. W. To be published. Google Scholar
7. Nash, J. F. Private Communication.Google Scholar
8. Fage, A. and Johansen, F. C. On the Flow of Air Behind an Inclined Flat Plate of Infinite Span. A.R.C. R. & M. No. 1104, 1927.Google Scholar
9. Goldstein, S. Modern Developments in Fluid Dynamics, Art. 242. Oxford, 1938.Google Scholar
10. R.Ae.S. Data Sheets. 02.04.01 and 02.04.02, 1947.Google Scholar