Turbulent burst control through phase-locked traveling surface depressions
Abstract
The influence of a traveling, surface depression on turbulent pre-burst flow has been investigated both theoretically and experimentally. Two-dimensional calculations of a transverse vortex (representing a 'typical' eddy) embedded in a laminar boundary layer show that properly phased-wall motion can reduce vorticity and raise wall pressure beneath the convecting vortex. Experiments in low-speed air with an electromagnetically driven wall membrane show that a traveling wall depression can accelerate flow near the wall and reduce pre-burst Reynolds stress.
- Publication:
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American Institute of Aeronautics and Astronautics
- Pub Date:
- March 1985
- Bibcode:
- 1985shfc.conf.....W
- Keywords:
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- Boundary Layer Control;
- Fluid-Solid Interactions;
- Turbulent Flow;
- Vortices;
- Wall Flow;
- Interactional Aerodynamics;
- Laminar Boundary Layer;
- Phase Locked Systems;
- Stabilizers (Fluid Dynamics);
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer