Control of laminar-instability waves using a new technique
- Creators
- Liepmann, H. W.
- Brown, G. L.
- Nosenchuck, D. M.
Abstract
A new technique using surface-film activators has been developed to induce and control laminar-instability waves by periodic heating. A flat plate was instrumented and installed in the GALCIT High-speed Water Tunnel with flush-mounted surface heaters and probes. Extremely two-dimensional naturally occurring Tolmien-Schlichting (TS) waves were observed along with the subsequent formation of turbulent spots. Laminar-instability waves were then excited in a controlled fashion using the surface-mounted heaters. A preliminary experiment on cancellation of excited laminar-instability waves was carried out. Finally, turbulent spots were produced using amplitude-modulated bursts to form Gaussian TS wave packets. Flow visualization, along with wall shear measurements, was used to infer the velocity and vorticity field near the wall.
Additional Information
© 1982 Cambridge University Press. Received 30 June 1981; Published Online 20 April 2006. The authors gratefully acknowledge support of this work by the Office of Naval Research under Contracts NO00 14-78-C-0457.Attached Files
Published - LIEjfm82a.pdf
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Additional details
- Eprint ID
- 32160
- Resolver ID
- CaltechAUTHORS:20120627-155913693
- N00014-78-C-0457
- Office of Naval Research (ONR)
- Created
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2012-06-28Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field