Aero-Optic Distortion Minimization using Active Flow Control

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,998.00
Award Year:
2002
Program:
STTR
Phase:
Phase I
Contract:
F49620-02-C-0051
Agency Tracking Number:
F023-0034
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Innovative Technology Applications Co.
PO Box 6971, Chesterfield, MO, 63006
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
126752018
Principal Investigator:
Alan Cain
President
(314) 576-1639
ITACabc@aol.com
Business Contact:
Nancy Hazinski
Secretary/Treasurer
(314) 576-1639
ITACnah@aol.com
Research Institution:
University of Notre Dame
Howard Hanson
Director - Office of Research, 511 Main Bldg.
Notre Dame, IN, 46556
(574) 631-3072
Nonprofit college or university
Abstract
"A system that integrates the use of zero frequency and high frequency flow control is proposed to reduce aero-optic distortions by minimizing large-scale shear layer structures. An important measure of performance for a tactical laser system is theintensity of the beam on a target. The performance of these systems is degraded by index of refraction variations introduced by large-scale flow structures along a beam path. In this investigation, carefully chosen excitation will be used toartificially alter the development of a shear layer, leading to a suppression of large flow structures and systematic improvements to a tactical laser system. Experimental and computational investigation will quantify the effect of forcing on compressibleshear layers and provide scaling the results for Mach number and Reynolds number effects. Time resolved wavefront measurements, as well as Schlieren and hot-wire anemometer measurements, will be used to assess the impact of control on the distortion of alaser beam propagating through the shear layer in the compressible regime. Developed capability will enable tactical directed energy weapons, as well as offering new optical communications capabilities for high speed air travel."

* information listed above is at the time of submission.

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