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Propagation of Tollmien Schlichting waves in a wing boundary layer
Seitz, A. and Horstmann, K.H. (2003) Propagation of Tollmien Schlichting waves in a wing boundary layer. In: Recent Results in laminar-turbulent transition, 86. Springer Verlag, Berlin, Heidelberg, New York. DFG Abschluß-Kolloquium Schwerpunkt "Transition", Stuttgart (de), 22.-24.04.2002. ISBN 3-540-40490-2.
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Abstract
So far, very little is known about instability wave propagation in a wing boundary layer in free flight. Therefore, flight tests were performed in order to investigate under conditions of natural excitement Tollmien-Schlichting waves as primary instabilities in transition to turbulence. Measurements were done with a 64 element hot-film array. the array was bonded to a laminar glove on the right hand wing of the flying testbed LFU 205. Amplitudes of wall shear stress fluctuations induced by Tollmien-Schlichting waves were quantified by employing a calibration procedure for hot-film sensors. Analysis of measured data reveals a brodband frequency spectrum of TS-instabilities typical for wave packages, while the spanwise extend of wave trains is comparatively small (in the order of about 3 wavelengths).
| Document Type: | Conference or Workshop Item (Paper) | ||||||
|---|---|---|---|---|---|---|---|
| Additional Information: | LIDO-Berichtsjahr=2004, | ||||||
| Title: | Propagation of Tollmien Schlichting waves in a wing boundary layer | ||||||
| Authors: |
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| Date: | 2003 | ||||||
| Journal or Publication Title: | Recent Results in laminar-turbulent transition | ||||||
| Volume: | 86 | ||||||
| Publisher: | Springer Verlag, Berlin, Heidelberg, New York | ||||||
| Series Name: | Notes on numerical fluid mechanics and multidisciplinary design. | ||||||
| ISBN: | 3-540-40490-2 | ||||||
| Status: | Published | ||||||
| Keywords: | Laminar flow, Boundary Layer, Tollmien-Schlichting waves | ||||||
| Event Title: | DFG Abschluß-Kolloquium Schwerpunkt "Transition", Stuttgart (de), 22.-24.04.2002 | ||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||
| HGF - Program: | Aeronautics | ||||||
| HGF - Program Themes: | L AR - Aircraft Research | ||||||
| DLR - Research area: | Aeronautics | ||||||
| DLR - Program: | L AR - Aircraft Research | ||||||
| DLR - Research theme (Project): | L - Flight Physics | ||||||
| Location: | Köln-Porz , Braunschweig , Göttingen | ||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology | ||||||
| Deposited By: | Claudia Grant | ||||||
| Deposited On: | 31 Jan 2006 | ||||||
| Last Modified: | 14 Jan 2010 19:23 |
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