Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-19T08:47:53.915Z Has data issue: false hasContentIssue false
  • English
  • Français

The control of boundary-layer transition using a wave-superposition principle

Published online by Cambridge University Press:  20 April 2006

Andrew S. W. Thomas
Andrew S. W. Thomas
Affiliation:
Lockheed-Georgia Company, Marietta, Georgia, U.S.A.
Get access Rights & Permissions [Opens in a new window]

Abstract

An experimental study has been made of the concept of controlling boundary-layer transition by superimposing in the flow Tollmien–Schlichting waves that are of equal amplitude and antiphased to the disturbances that grow and lead to transition. The cases that have been considered are transition arising from a single-frequency two-dimensional disturbance and transition arising from a nonlinear interaction between two waves of different frequency. A feedback system for controlling transition has also been studied. In each case, both hot-wire surveys and flow visualization have shown that it is possible to delay transition but that the flow cannot be restored completely to its undisturbed state. This appears to be a consequence of interactions between the very weak three-dimensional background disturbances in the flow and the primary two-dimensional waves. The implications of these findings in an implementation of the concept are discussed.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 137 , December 1983 , pp. 233 - 250
Copyright
© 1983 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

Craik, A. D. D. 1971 J. Fluid Mech. 50, 393.
Kachanov, Tu. S., Koslov, V. V. & Levchenko, V. YA. 1980 In Laminar-Turbulent Transition (ed. R. Eppler & H. Fasel). Springer.
Knapp, C. F. & Roache, P. J. 1968 AIAA J. 6, 26.
Liepmann, H. W., Brown, G. L. & Nosenchuck, D. M. 1982 J. Fluid Mech. 118, 187.
Liepmann, H. W. & Nosenchuck, D. M. 1982 J. Fluid Mech. 118, 201.
Milling, R. W. 1981 Phys. Fluids 24, 979.
Saric, W. S. & Reynolds, G. A. 1980 In Laminar-Turbulent Transition (ed. R. Eppler & H. Fasel). Springer.
Spangler, J. G. & Wells, C. S. 1968 AIAA J. 6, 543.
Thomas, A. S. W. & Saric, W. S. 1981 Bull. Am. Phys. Soc. 26, 1252.