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NASA Glenn Research Center
OAI
Boeing Commerical Airplanes
GE Aircraft Engines
Honeywell International
Pratt & Whitney
Rolls-Royce
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NASA Glenn Research Center
The GRC Acoustics Branch
The Acoustics Branch at the NASA Glenn Research Center conducts research directed at aircraft engine noise reduction. Both experimental and analytical research is performed within the branch. The research focuses on noise reduction technologies for turbofan engines while maintaining acceptable aerodynamic performance. Emphasis is given to fan and jet noise reduction for both subsonic and supersonic applications. Fan/nacelle models are tested in wind tunnels to determine the aerodynamic performance and acoustic characteristics. Nozzles are tested in anechoic free-jets for jet noise research. Detailed diagnostic measurements are also obtained using LDV, hot-wires, acoustic mode measurements, kulites, and phased array methods. Computer codes are developed that model the steady and unsteady aerodynamics for various components of a turbofan engine. Engine noise prediction codes are developed and validated using experimental data. Advanced computational procedures and codes are developed (computational aeroacoustics) that directly compute the sound. Active noise control methods are explored for both fan and jet noise reduction.
Contact Information
Edmane Envia, Acoustics Branch
NASA Glenn Research Center
21000 Brookpark Road
Mail Stop 54-3
Cleveland, OH 44135
Phone: 216.433.8956
Edmane.Envia-1@nasa.gov |
Dennis Huff, Chief of the Acoustics Branch
NASA Glenn Research Center
21000 Brookpark Road
Mail Stop 77-6
Cleveland, OH 44135
Phone: 216.433.3913
Dennis.L.Huff@grc.nasa.gov |
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