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Overview
The Aeroacoustics Branch plans and conducts research aimed at understanding, predicting and controlling the noise of all classes of aircraft. Research includes fundamental, theoretical, analytical, and experimental components as well as applied efforts in support of NASA's Quiet Aircraft Technology program. Research emphasis is on the fluid mechanics and acoustics of jets, nacelle and fan aeroacoustics, propulsion/airframe aeroacoustics, and atmospheric sound propagation. Objectives of the research are to understand noise generation processes, to develop methods for predicting acoustics and flow fields and their interactions, and to identify and demonstrate noise reduction and control techniques. Experimental research is conducted in anechoic facilities, laboratories, wind tunnels, and on vehicles in flight. Code development is based on CFD based methods in conjunction with the Lighthill analogy, as well as empirical and semi-empirical aircraft systems noise prediction such as the Aircraft Noise Prediction Program (ANOPP). |
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to the No Fear Act