Novel Methods for Sensor Quieting in Turbulent Flows

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: N10PC20088
Agency Tracking Number: 09ST2-0023
Amount: $98,841.00
Phase: Phase I
Program: STTR
Awards Year: 2010
Solicitation Year: 2009
Solicitation Topic Code: ST092-004
Solicitation Number: 2009.B
Small Business Information
PO Box 6971, Chesterfield, MO, 63006
DUNS: 126752018
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Alan Cain
 (314) 373-3311
Business Contact
 Alan Cain
Title: President
Phone: (314) 373-3311
Research Institution
 University of Toledo
 James D
 Researchand Sponsored Programs
2801 W. Bancroft St.
Toledo, OH, 43606
 (419) 530-2844
 Nonprofit college or university
Undersea acoustic sensors are a critical need for U.S. Navy surveillance applications. They are used for measuring acoustic energy originating from distance source to help detect and classify quiet threat targets, as in sonar applications. To expand their field of regard, large sensor arrays are placed at multiple locations along the vehicle body where flow turbulence-induced noise plays a major factor in reducing the sensors’ effectiveness. It is desired to quiet this flow turbulence-induced noise floor that severely limits the ability of an acoustic sensor to detect quiet acoustic signals. We propose to design and investigate a novel, localized active flow-control (AFC) approach to quiet an acoustic sensor by significantly attenuating local turbulence and wall pressure fluctuations around the entire boundary layer around the sensor. The Phase I effort will establish feasibility of the hydrodynamic AFC technique using a combination of numerical and experimental studies in addition to filtering and post-processing schemes to correct for fine-scale disturbances that remain in the flow region of interest. The final product is expected to be a quiet acoustic sensor package design with integrated localized, hydrodynamic flow-control system that can be scaled and mass produced to meet the Navy platform requirements.

* Information listed above is at the time of submission. *

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