Susceptibility of flows with small spatial inhomogeneities to acoustic perturbations
Abstract
Flow over a 1.5-m-long, 10-mm-thick flat plate of organic glass with an ellipsoidal nose section was investigated experimentally using a low-turbulence wind tunnel. It is found that the introduction of small inhomogeneities into the boundary layer of the plate destabilizes the flow and that changes in the form of the inhomogeneity have a strong effect on the vortex wave growth rate. The susceptibility of the flow to acoustic perturbations depends on the form of the inhomogeneity; the amplitude of the excited wave increases with the size of the separation zone behind the small inhomogeneity.
- Publication:
-
Akademiia Nauk SSSR Sibirskoe Otdelenie Izvestiia Seriia Tekhnicheskie Nauki
- Pub Date:
- January 1990
- Bibcode:
- 1990SiSSR.......44K
- Keywords:
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- Boundary Layer Flow;
- Flat Plates;
- Sound Waves;
- Tollmien-Schlichting Waves;
- Wind Tunnel Tests;
- Acoustic Propagation;
- Aeroacoustics;
- Low Turbulence;
- Vortices;
- Acoustics