In summary, the proposed AeroAcoustics Research Consortium is expected to be a very visible, cost effective, strategic national asset for GRC, industry, other governmental laboratories and universities. The Management Council will consist of representatives from NASA Glenn Research Center, OAI and participating industry members. 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.
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. Active noise control methods are explored for both fan and jet noise reduction.