Measurements of energy losses associated with interactions between acoustic waves and a steady flow field
Abstract
An experimental program has been conducted to study interactions between acoustic waves and non-uniform flow fields. Data have been taken in an impedance tube, modified to accommodate an average flow, and in a resonance tube. Results are given for the influence of flow through a subsonic exhaust vent on an acoustic field. Measurements for circular and slot vents of several sizes and for two frequencies show that the flow through the vent causes a transfer of energy from the average flow field to the acoustic field: The vent acts as a source or gain of acoustic energy.
- Publication:
-
California Instute of Technology Technical Report
- Pub Date:
- March 1978
- Bibcode:
- 1978cit..rept.....C
- Keywords:
-
- Combustion Stability;
- Nonuniform Flow;
- Solid Propellant Rocket Engines;
- Sound Waves;
- Acoustic Impedance;
- Energy Transfer;
- Exhaust Gases;
- Flow Distribution;
- Fluid Mechanics and Heat Transfer