The influence of flow on the acoustic characteristics of a duct bend for higher order modes—A numerical study
Abstract
A numerical technique was used to investigate the effects of flow on the acoustic transmission and reflection characteristics of a duct bend. The range of wave numbers examined extended to the cut-on value of the second cross-mode. Characteristics were studied in terms of the velocity potential, the acoustic pressure and the energy flux. The effects of locating a turning vane centrally in the bend were also examined in terms of the energy flux.
- Publication:
-
Journal of Sound Vibration
- Pub Date:
- May 1982
- DOI:
- 10.1016/0022-460X(82)90548-X
- Bibcode:
- 1982JSV....82..131C
- Keywords:
-
- Acoustic Ducts;
- Aeroacoustics;
- Corner Flow;
- Ducted Flow;
- Flow Geometry;
- Propagation Modes;
- Amplitudes;
- Energy Transfer;
- Finite Element Method;
- Propagation Velocity;
- Subsonic Flow;
- Wave Reflection;
- Acoustics