The stabilization of Tollmien-Schlichting (TS) waves in a spanwise modulated Blasius boundary layer has been experimentally verified in the MTL wind tunnel at KTH. The alternating high and low speed streaks were created by regularly spaced cylindrical roughness elements mounted near the leading edge of the flat plate. It is shown that the larger the streak amplitude is the larger is the damping effect of the TS-waves, which is in agreement with recent theoretical works.

STABILIZATION OF TOLLMIEN-SCHLICHTING WAVES BY MEANS OF ROUGHNESS GENERATED STREAKS

TALAMELLI, ALESSANDRO;
2005

Abstract

The stabilization of Tollmien-Schlichting (TS) waves in a spanwise modulated Blasius boundary layer has been experimentally verified in the MTL wind tunnel at KTH. The alternating high and low speed streaks were created by regularly spaced cylindrical roughness elements mounted near the leading edge of the flat plate. It is shown that the larger the streak amplitude is the larger is the damping effect of the TS-waves, which is in agreement with recent theoretical works.
2005
Atti del XVIII Congresso Nazionale AIDAA (Associazione Italiana di Aeronautica e Astronautica)
Talamelli A.; Fransson J.H.M.; Brandt L.; Cossu C.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/11628
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