Novel Methods for Sensor Quieting in Turbulent Flows

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$98,831.00
Award Year:
2010
Program:
STTR
Phase:
Phase I
Contract:
N10PC20089
Award Id:
94831
Agency Tracking Number:
09ST2-0024
Solicitation Year:
n/a
Solicitation Topic Code:
DARPA 09T004
Solicitation Number:
n/a
Small Business Information
9500 Innovation Drive, Manassas, VA, 20110
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
945837219
Principal Investigator:
Jim Powers
Principal Investigator
(801) 359-4566
jim.powers@progeny.net
Business Contact:
Christine Sigety
Manager of Business Support
(703) 368-6107
csigety@progeny.net
Research Institute:
University of Utah
Todd Nilsen
Office of Sponsored Projects
1471 Federal Way
Salt Lake City, UT, 84102
(801) 581-8948
Nonprofit college or university
Abstract
The Progeny - University of Utah team proposes a new approach for flow noise reduction to improve acoustic sensor performance. Our proposal is to investigate the ability of controlling the turbulent flow by utilizing acceleration which makes the flow locally laminar. Our proposed method of achieving acceleration is to send the flow around a concave surface, by adding a "two-dimensional bump" to an otherwise flat wall. Wall pressure versus distance measurements have shown that the pressure decreases in the first part of the concavity of the bump, and becomes normal again (fully turbulent) downstream. This means that the total amount of flow noise reaching a sensor below the bump will be less than if the sensor were under a flat wall, with turbulence along its entire length.

* information listed above is at the time of submission.

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