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Investigation of refracting flows for acoustic suppression
- Publication Year :
- 1977
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1977.
-
Abstract
- An experimental investigation to determine the possibility of using refracting flows for the suppression of aircraft inlet noise is described. Observations of wave refraction in duct flows and measurements of the increase in effectiveness of acoustic linings due to refraction have suggested methods for the design of engine inlet ducts which can either suppress noise internally or direct it to where it causes less annoyance.
- Subjects :
- Aerodynamics
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Notes :
- NAS1-14187
- Publication Type :
- Report
- Accession number :
- edsnas.19770014106
- Document Type :
- Report