Exhaust Jet Noise Reduction for Tactical Aircraft
Agency / Branch:
DOD / NAVY
The absence of a comprehensive, integrated aerodynamic/aero-acoustic modeling and analysis framework represents an impediment to achieving significant noise reduction within constraints imposed by the engine cycle, realistic geometry, and airframe. We close the gap by developing a suite of advanced, high fidelity nozzle performance and jet noise-based tools integrated into a unified software package with validation cases and applicability assessments. The flow field software will be based on TTC Technologies, Inc. multi-disciplinary high-order CFD tool, AEROFLO, which predicts temporal and spatial flow fields at all speeds (subsonic, transonic, supersonic, and hypersonic). The tools, ranging from RANS to LES, will be installed as modules interfaced with a comprehensive set of aeroacoustic source modules populated with fundamental physics-based aeroacoustic and semi-empirical models, to allow a range of prediction methods via "pull-down" menus. A large-scale noise model based on a RANS/PSE approach developed by UTRC and Caltech will also be implemented. The simulation codes will be rigorously validated using UTRC acquired data with limitations documented in terms of accuracy, robustness, sensitivity, turnaround time plus recommendations for improvements. The tool will provide a comprehensive approach to the design and development of nozzle components that attenuate exhaust jet noise.
Small Business Information at Submission:
TTC TECHNOLOGIES, INC.
P. O. Box 1527 Stony Brook, NY 11790
Number of Employees: