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
Agency Tracking Number:
09ST2-0024
Solicitation Year:
2009
Solicitation Topic Code:
ST092-004
Solicitation Number:
2009.B
Small Business Information
Progeny Systems Corporation
9500 Innovation Drive, Manassas, VA, 20110
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
945837219
Principal Investigator
 Jim Powers
 Principal Investigator
 (801) 359-4566
 jim.powers@progeny.net
Business Contact
 Christine Sigety
Title: Manager of Business Support
Phone: (703) 368-6107
Email: csigety@progeny.net
Research Institution
 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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