New Method for Determination of Acoustic Signatures in Wind Tunnel Testing

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,936.00
Award Year:
2002
Program:
SBIR
Phase:
Phase I
Contract:
F40600-02-C-0014
Award Id:
57790
Agency Tracking Number:
021XP-0034
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
358 East Fillmore Avenue, St. Paul, MN, 55107
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
041776824
Principal Investigator:
Dean Long
Senior Corporate Engineer
(651) 220-1290
dlong@aerosysengr.com
Business Contact:
Donald Kamis
Vice President WT Mktg.
(651) 220-1139
shedberg@aerosysengr.com
Research Institution:
n/a
Abstract
"The acoustic signature generated by test articles in high speed wind tunnel tests is difficult to measure due to the high level of background noise created by the wind tunnel flow. A unique research program using microphone arrays is proposed to addressthis issue. The program combines experimental tests and analytical algorithm development to devise a system able to reject the undesirable wind tunnel noise and retain the noise generated by the test article. A generic model of an aircraft weapons bay willbe built and tested in a wind tunnel. The data collected from different microphone arrays will be analyzed using different source bearing and filtering algorithms to determine the optimum arrangement for the array and the processing algorithms.Individually, all algorithms exist and have been tested at the ASE FluiDyne Aero Test Laboratory and will provide the fundamental basis for the analysis tools. The use of these algorithms in proper combination provides the critical feature to the successof the program. A preliminary test program using a simple weapons bay model has been conducted which verifies the ability of this procedure to separate the wind tunnel noise from the model noise. The program will provide technology needed to accuratelydetermine and characterize noise sources in a wind tunnel. Potential applications include development testing of aircraft and automotive components and equipment in wind tunnels where the acoustic q

* information listed above is at the time of submission.

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