A PREDICTION MODEL FOR ADVANCED LEADING-EDGE VORTEX FLOW CONTROL

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$110,000.00
Award Year:
1987
Program:
SBIR
Phase:
Phase II
Contract:
n/a
Award Id:
3647
Agency Tracking Number:
3647
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2133 152nd Ave Ne, Redmond, WA, 98052
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Dr Brian Maskew
(206) 643-9090
Business Contact:
() -
Research Institute:
n/a
Abstract
THE OBJECTIVE IS TO DEVELOP A TOOL FOR DESIGNING VORTEX FLAPS ON ADVANCED FIGHTER AIRCRAFT INCLUDING THE EFFECTS OF VISCOSITY. ANALYTICAL METHODS, INC. PROPOSES TO USE AN UNSTEADY TIME-STEPPING VERSION OF ITS SURFACE SINGULARITY PANEL METHOD, VSAERO, AS A BASIS FOR THIS WORK. THIS WILL GENERATE THE PRELIMINARY VORTEX STRUCTURE (LEADING-EDGE VORTICE, FOREBODY VORTICES, ETC.) FOR THE COMPLETE CONFIGURATION; THE SOLUTION WILL BE COMPUTED AS A LIMITING STATE AT CONSTANT INCIDENCE WITHOUT CONICAL FLOW OR SLENDER BODY ASSUMPTIONS. COUPLED BOUNDARY LAYER CALCULATIONS--PROCEEDING AWAY FROM PREDICTED ATTACHMENT LINES--WILL PROVIDE DISPLACEMENT EFFECTS AND SEPARATION LOCATIONS. THE LATTER WILL INDICATE WHERE NEW WAKE SHEETS (E.G., SECONDARY VORTICES) NEED TO BE ADDED BEFORE COMPUTING THE NEW PRESSURE DISTRIBUTION FOR THE NEXT CYCLE. EXISTING EXPERIMENTAL DATA WILL BE USED FOR CORRELATION PURPOSES AND TO HELP REFINE MODELING DETAIL. IN DEVELOPING THIS APPROACH INTO A PRACTICAL DESIGN TOOL, THE AIM WILL BE TO MAINTAIN THE ARBITRARY GEOMETRY CAPABILITY, THE LOW COMPUTING COST AND THE EASE OF USE OF THE PANEL METHOD AND TO MODEL THE EFFECTS OF VISCOSITY AS CLOSELY AS POSSIBLE.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government