Low Dimensional Methods for Jet Noise Control
Abstract
Low-dimensional techniques (i.e., POD, Linear Stochastic Estimation) are applied to the compressible jet mixing layer in the sound source regions of the flow. Measurements are acquired along the streamwise cross plane using a multi-component PIV system. The low-dimensional analysis is employed to reconstruct temporally, the 3D velocity field, estimated from an azimuthal array of fifteen dynamic pressure transducers positioned near the jet lip. These transducers are located outside of the turbulent sound source regions of the flow, so that the acoustical characteristics of the sound source events are not disturbed. A volcano like event is found similar to the one modeled by Glauser and George, and later confirmed experimentally by Citrinit and George. It is this event that is thought to produce much of the noise experienced in the far field acoustic regions. A survey of the far field noise was performed simultaneously with the near field pressure. Currently we are comparing estimates of the far field noise with those computed from the velocity field extracted in this study.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 14, 2005
- Accession Number
- ADA433156
Entities
People
- Charles E. Tinney
- Lawrence S Ukeiley
- Mark N. Glauser
Organizations
- Syracuse University