| PROPOSAL NUMBER: | 03-A2.01-7765 (For NASA Use Only - Chron: 035242) |
| SUBTOPIC TITLE: | Propulsion System Emissions and Noise Prediction and Reduction |
| PROPOSAL TITLE: | Identification of Turbomachinery Noise Sources Using Acoustical Holography |
SMALL BUSINESS CONCERN
(Firm Name, Mail Address, City/State/Zip, Phone)
Comet Technology Corporation
1796 Stonebridge Drive North
Ann Arbor ,MI 48108 - 8593
(734) 998 - 0126
PRINCIPAL INVESTIGATOR/PROJECT MANAGER
(Name, E-mail, Mail Address, City/State/Zip, Phone)
Satha Raveendra
t.raveendra@netzero.net
1796 Stonebridge Drive North
Ann Arbor ,MI 48108 -8593
(734) 998 - 0126
U.S. Citizen or Legal Resident: Yes
TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Evaluation and enhancement of the acoustical performance of turbomachinery requires knowledge of the acoustic sources. However, the noise generation mechanisms associated with turbomachinery are complex and as result it is not easy to identify these noise sources. The development of an integrated experimental/numerical technique that is based on holography and is applicable for the identification and ranking of complex noise sources is proposed. A new technique based on potential integral equations will be developed to rapidly evaluate the noise sources of complex structures. Generalized acoustical holography that is applicable for arbitrary geometry is extended by incorporating aeroacoustic noise sources in the presence of mean flow.
POTENTIAL NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
Applicable for the identification and ranking of complex noise sources associated with turbomachinery, including engine, fan and compressor noise sources. Also applicable to the identification of vibrational noise sources.
POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (LIMIT 150 WORDS)
Applicable for the identification of ranking of aeroacoustic noise sources associated with fans and similar products that are used in industries such as automotive and consumer products.