Changes in the structure of the wake behind two cantilever cylinders under acoustic loading
Abstract
The effect of sound intensity and frequency on the mean and pulse flow characteristics in the wake of a pair of cantilever circular cylinders was investigated experimentally for different positions of the cylinders relative to the incoming flow velocity vector. The experiments were conducted in a low-turbulence 1 x 1 m wind tunnel using 200-mm-long, 20-mm-diameter smooth cylinders placed on a horizontal profiled plate of organic glass. It is shown that the superposition of acoustic perturbations with a frequency about an order of magnitude higher than the natural vortex shedding frequency leads to an increase in mean and pulse velocity, with the exception of the case of a very small gap between the parallel cylinders.
- Publication:
-
Akademiia Nauk SSSR Sibirskoe Otdelenie Izvestiia Seriia Tekhnicheskie Nauki
- Pub Date:
- December 1989
- Bibcode:
- 1989SiSSR.......58B
- Keywords:
-
- Acoustic Propagation;
- Cantilever Members;
- Circular Cylinders;
- Sound Waves;
- Wakes;
- Aeroacoustics;
- Flow Velocity;
- Velocity Distribution;
- Vortices;
- Acoustics