Accession Number:

ADA101540

Title:

Low-Speed Aerodynamic Characteristics of a Small, Fixed-Trailing-Edge Circulation Control Wing Configuration Fitted to a Supercritical Airfoil

Descriptive Note:

Final rept. Mar 80-Jan 81

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT

Personal Author(s):

• Englar, Robert J.

Report Date:

1981-03-01

Pagination or Media Count:

54.0

Abstract:

Excellent high-lift and cruise performance of a small, round, fixed circulation control wing CCW trailing edge fitted to a supercritical airfoil has been confirmed by subsonic wind tunnel investigations. This fixed-trailing- edge blown high-lift airfoil generates a negligible subsonic cruise drag penalty, but can generate a section lift coefficient near 7.0. This configuration is a significant improvement over the flight-proven A-6CCW airfoil that had similar lift performance, but had a large trailing edge requiring mechanization for transition to cruise flight. Further, the large leading edge radius of the supercritical airfoil allows operating at high lift over a moderate angle-of-attack range. These results imply the feasibility of a mono-element airfoil with no moving components required for high lift the transition from the cruise to the high-lift configuration is accomplished by blowing from a fixed slot. The favorable characteristics of both the cruise and high-lift airfoils are retained without compromise to either. Author

Descriptors:

• *BOUNDARY LAYER CONTROL
• *AERODYNAMIC CONTROL SURFACES
• *SUPERCRITICAL AIRFOILS
• AUGMENTATION
• ANGLE OF ATTACK
• COEFFICIENTS
• WIND TUNNEL TESTS
• HIGH LIFT
• LEVEL FLIGHT
• WINGS
• CIRCULATION
• SUBSONIC WIND TUNNELS
• TRAILING EDGES
• DRAG REDUCTION
• SHORT TAKEOFF AIRCRAFT
• BLEED SYSTEMS
• PLENUM CHAMBERS

Subject Categories:

• Aerodynamics
• VSTOL

Distribution Statement:

APPROVED FOR PUBLIC RELEASE