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DIRECT COMPUTATION OF TURBULENCE NOISE

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
6810
Program Year/Program:
1989 / SBIR
Agency Tracking Number:
6810
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Aerochem Research
P O Box 12 Princeton, NJ 08542
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1989
Title: DIRECT COMPUTATION OF TURBULENCE NOISE
Agency: NASA
Contract: N/A
Award Amount: $349,697.00
 

Abstract:

DIRECT COMPUTATION OF TURBULENCE NOISE IS A LOGICAL APPLICATION FOR ADVANCED COMPUTATIONAL FLUID DYNAMICS, CFD, PROGRAMS RUN ON SUPERCOMPUTERS. THIS WOULD ELIMINATE THE HIGHLY EMPIRICAL ASPECTS OF PRESENT NOISE PREDICTION TECHNIQUES AND ENABLE STUDY OF ADVANCED HYPERSONIC PROPULSION SYSTEMS. HOWEVER, MANY OF THE SAME PERSISTENT PROBLEMS OF IMPLEMENTATION THAT EXIST IN AEROACOUSTIC THEORY AND MEASUREMENT WILL ALSO PREVAIL IN A FULLY NUMERICAL APPROACH. A FUNDAMENTAL STUDY OF THE MEANS OF APPLYING CFD TECHNIQUES TO NOISE COMPUTATIONS IS THEREFORE IMPERATIVE. JUST AS THERE ARE MANY CFD TECHNIQUES, THERE ARE ALSO MANY WAYS TO DETERMINE THE ACOUSTIC FIELD GIVEN THEFLOW RESULTS. WE WILL ASSESS THE BEST ACOUSTIC TECHNIQUE FOR EACH OF SEVERAL GENERAL CFD APPROACHES, I.E., THOSE USING FINITE DIFFERENCE, VORTICITY, AND SPECTRAL METHODS. PHASE I WILL FOCUS ON THE CONNECTION BETWEEN CFD AND AEROACOUSTIC THEORY, RECOMMEND MODIFICATIONS AND IMPROVEMENTS IN CFD TECHNIQUES USED FOR NOISE CALCULATIONS, EVALUATE THE COMPUTATIONAL POTENTIAL FOR HYPERSONIC FLOWS, AND RECOMMEND SPECIFIC COMPUTATIONAL TECHNIQUES TO BE STUDIED AND DEVELOPED IN PHASE II.

Principal Investigator:

Charles H Berman

Business Contact:

Small Business Information at Submission:

Aero-chem Research Laboratorys
Po Box 12 Princeton, NJ 08542

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No