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Mitigation of Aero-Optic Distortions by Active Flow Control

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F49620-02-C-0064
Agency Tracking Number: F023-0197
Amount: $99,958.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: N/A
Solicitation Number: N/A
Solicitation Year: N/A
Award Year: 2002
Award Start Date (Proposal Award Date): N/A
Award End Date (Contract End Date): N/A
Small Business Information
5004 NW 60th Terrace
Gainesville, FL 32653
United States
DUNS: 113641695
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Louis Cattafesta
 (352) 682-6002
Business Contact
 Louis Cattafesta
Title: President
Phone: (352) 682-6002
Research Institution
 University of Florida
 Bruce Carroll
231 Aerospace Building, P.O. Box 116250
Gainesville, FL 32611
United States

 (362) 392-4943
 Nonprofit College or University

"The goal of the proposed project is to develop and demonstrate an integrated flow control system to reduce aero-optic distortions via control of large-scale shear layer structures and manipulation of the turbulence spectrum in a compressible shear flow.Density fluctuations in a compressible shear layer can produce time-varying index of refraction across the shear layer. Optical systems that must operate in this aero-optic environment experience various types of degradations in performance due to therefractive index changes associated with these density variations. Recent work suggests that control of the compressible shear layer is possible such that an adaptive aero-optical system may be developed to alleviate many of these problems. Active flowcontrol strategies capable of virtually eliminating the large scale coherent structures in the compressible shear layer are addressed. Phase I will develop prototype actuators and demonstrate their impact on the aero-optic distortions in a small scaleexperimental test configuration. Phase II will refine the actuation and control strategy. Detailed experimental and computational investigations of the flow phenomena will guide the actuation/control work. Results from this project will improve theperformance of airborne optical systems. Non-military applications include optical data links for commercial aircraft. Reduced aero-optical distortions. Improved performance of airborne laser systems and directed energy weapons and optical data links forcommercial aircraft. Active suppression of oscillations in aircraft weapons bays."

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

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