Federal award (DELIVERY ORDER, fiscal year 2023)
Recipient: NATIONAL INSTITUTE OF AEROSPACE ASSOCIATES
Awarding agency: National Aeronautics and Space Administration / National Aeronautics and Space Administration
Funding agency: National Aeronautics and Space Administration / National Aeronautics and Space Administration
Period of performance: 2018-05-21 to 2019-05-15
Current total value of award: $94046.27
Description: TD-FAST (TIME DOMAIN FAST ACOUSTIC SCATTERING TOOLKIT).  ACCURATE AND EFFICIENT HIGH-FIDELITY NOISE PREDICTION TOOLS ARE CRITICAL TO THE DESIGN AND ASSESSMENT OF NEXT GENERATION AIRCRAFT. THE PURPOSE OF THIS RESEARCH IS TO FURTHER DEVELOP, IMPLEMENT AND VALIDATE AN EFFICIENT HIGH-FIDELITY TIME DOMAIN ACOUSTIC SCATTERING PREDICTION TOOL THAT IS CAPABLE OF TREATING A COMPLETE AIRCRAFT, COVERING A FULL FREQUENCY RANGE OF INTEREST WITHIN A SHORT TURN-AROUND TIME.  TIME DOMAIN ACOUSTIC SCATTERING PREDICTION CAPABILITIES HAVE SOME DISTINCT ADVANTAGES OVER FREQUENCY DOMAIN APPROACHES. MOST NOTABLY, SCATTERING SOLUTIONS AT ALL FREQUENCIES ARE OBTAINED WITHIN ONE SINGLE COMPUTATION. IN ADDITION, BROADBAND NOISE SOURCES AND TIME DEPENDENT TRANSIENT SIGNALS CAN BE SIMULATED AND STUDIED. THE TIME DOMAIN APPROACH ALSO COUPLES NATURALLY WITH NONLINEAR COMPUTATIONS WHERE MANY FREQUENCIES ARE GENERATED. FINALLY, WITH RECENT ADVANCES IN MULTI-LEVEL ALGORITHMS, COMPUTATIONAL COMPLEXITY CAN BE GREATLY REDUCED, MAKING IT FEASIBLE FOR ROUTINE APPLICATION AT MID TO HIGH FREQUENCIES WITH REDUCED RESOURCE REQUIREMENTS.