LOW-SPEED EXPERIMENTAL INVESTIGATIONS OF VORTEX CONTROL CONCEPTS ON A GENERIC CHINE FOREBODY/DELTA WING CONFIGURATION AT HIGH ANGLES ...

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 10356
Amount: $56,855.00
Phase: Phase I
Program: SBIR
Awards Year: 1989
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Vigyan Research Assocs Inc
30 Research Dr, Hampton, VA, 23666
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr D M Rao
 (804) 865-1400
Business Contact
Phone: () -
Research Institution
N/A
Abstract
AN EXPERIMENTAL FEASIBILITY STUDY IS PROPOSED OF TWO SEPARATE AERODYNAMIC CONCEPTS FOR DIRECT AND INDEPENDENT CONTROL OF CHINE FOREBODY VORTICES AT HIGH ANGLES OF ATTACK AND IN SIDESLIP: (A) LONGITUDINALLY HINGED CHINES THAT CAN BE MOVED TO VARIABLE DIHEDRAL OR ANHEDRAL ANGLE; AND (B) SPANWISE JET-SHEET BLOWN HORIZONTALLY FROM SLOTS LOCATED ALONG THE CHINE EDGE. BOTH APPROACHES ENVISAGE CONTROLLING STRENGTH AND TRAJECTORY OF THE SHED CHINE VORTEX PAIR, EITHER IN UNISON OR DIFFERENTIALLY, TO MODIFY THE MERGER AND BREAKDOWN OF THE VORTEX SYSTEM OVER THE WING AND THEREBY CONTROL THE WING LIFT CHARACTERISTICS PARTICULARLY IN THE C(L) MAX AND POST-STALL REGIME. IN A LOW-SPEED WIND TUNNEL STUDY OF THE TWO CONCEPTS APPLIED TO A COMMON GENERIC HINE FOREBODY/55 DEG DELTA WING CONFIGURATION, WING UPPER-SURFACE SUCTION PRESSURE MEASUREMENTS AND SUPPORTING SMOKE FLOW VISUALIZATIONS WILL BE OBTAINED FOR AN INITIAL QUANTITATIVE EVALUATION OF CONTROL EFFECTIVENESS AND ASSOCIATED VORTICAL FLOW CHARACTERISTICS, AT ANGLES OF ATTACK UP TO 60 DEG. AND SIDE-SLIP ANGLES TO +/20 DEG.

* information listed above is at the time of submission.

Agency Micro-sites

US Flag An Official Website of the United States Government