The Reduction of Advanced Military Aircraft Noise
Abstract
This report describes a combined experimental and computational study of the generation and radiation of jet noise from high performance military fighter aircraft. An emphasis is on the methodology for scaling measurements at small and moderate scale to full scale aircraft engines. Promising concepts for jet noise reduction are explored at small and moderate scale. Numerical simulations are performed to support the experiments and provide additional insight into the noise generation and radiation process. Noise and flow measurements are performed in the Anechoic Jet Noise Research Facility at Penn State and the Aero-Acoustic Propulsion Laboratory at the NASA Glenn Research Center. Designs for the baseline nozzles are developed by General Electric Aviation. A computational study of the effect of chevrons on the jet flow is conducted by General Electric and used to design chevron nozzles that are then studied experimentally by NASA and Penn State. The results were transferred for use in the Advanced Acoustic Model, which is used to assess the impact of aircraft operations on communities surrounding military bases.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2011
- Accession Number
- ADA557350
Entities
People
- Brenda Henderson
- Dennis Mclaughlin
- James Bridges
- Kenneth Plotkin
- Philip J. Morris
- Richard Mckinley
- Steve Martens
- Victor Sparrow
Organizations
- Pennsylvania State University