ENHANCED LIFT THROUGH DYNAMIC FLOW MANIPULATION

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$50,000.00
Award Year:
1992
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Award Id:
18706
Agency Tracking Number:
18706
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
3117 Campfire Drive, Lawrence, KS, 66049
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr. Saeed Farokhi
(913) 842-6398
Business Contact:
() -
Research Institution:
n/a
Abstract
1A multi-segmented dynamic leading-edge flap system is proposed as a candidate for lift enhancement through dynamic flow manipulation. Delta wings with sweep angles of 60 degrees or more will be fitted with the proposed leading-edge device of 3 or more flaps. Each flap is controlled with a high-speed digital linear stepper motor and is capable of executing autonomous oscillations. It is intended to capitalize on excitation of helical instability waves of clockwise and counterclockwise spin on the separated leading-edge vortex to manipulate the pressure distribution along the vortex core. This in turn affects the location of vortex breakdown which could lead to enhanced lift and super-maneuverability of a delta or cropped delta wing aircraft. A parallel effort will be spent on incorporating piezo-electric oscillator/exciters on swept wing leading edges, which will dynamically manipulate camber distribution along the wing span in a 3-D fashion. With the proper choice of the driving frequency (i.e., nondimensional Strouhal number), a resonant flow behavior can be excited, which in turn eliminates the need for large-amplitude leading-edge oscillations. We currently estimate a maximum angular oscillation amplitude of +/- 5 degrees.

* information listed above is at the time of submission.

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