Near field pressure fluctuations in a circular jet
Abstract
The vortical structures in shear layers govern many dynamic aspects of the jet, including entrainment of mass, transfer of momentum and noise generation. These structures develop from instability waves and undergo a merging process. Vortex merging reduces the time scale and increases the length scale of the shear layer. At the same time pressure fluctuations are induced by the unsteady motion. These pressure perturbations can exert high level dynamic loading on nearby structures, and radiate to the far field as noise. In this study, the generation mechanism of the pressure fluctuations and the radiation process are examined.
- Publication:
-
Final Report
- Pub Date:
- 1985
- Bibcode:
- 1985usc..rept.....H
- Keywords:
-
- Jet Flow;
- Near Fields;
- Pressure Gradients;
- Dynamic Loads;
- Far Fields;
- Mass Flow;
- Momentum Transfer;
- Noise Spectra;
- Perturbation;
- Shear Layers;
- Sound Waves;
- Vortices;
- Fluid Mechanics and Heat Transfer