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Airfoil modification effects on subsonic and transonic pressure distributions and performance for the ea-6b airplane
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sewall, William G. Allison, Dennis O. |
| Copyright Year | 1995 |
| Description | Longitudinal characteristics and wing-section pressure distributions are compared for the EA-6B airplane with and without airfoil modifications. The airfoil modifications were designed to increase low-speed maximum lift for maneuvering, while having a minimal effect on transonic performance. Section contour changes were confined to the leading-edge slat and trailing-edge flap regions of the wing. Experimental data are analyzed from tests in the Langley 16-Foot Transonic Tunnel on the baseline and two modified wing-fuselage configurations with the slats and flaps in their retracted positions. Wing modification effects on subsonic and transonic performance are seen in wing-section pressure distributions of the various configurations at similar lift coefficients. The modified-wing configurations produced maximum lift coefficients which exceeded those of the baseline configuration at low-speed Mach numbers (0.300 and 0.400). This benefit was related to the behavior of the wing upper surface leading-edge suction peak and the behavior of the trailing-edge pressure. At transonic Mach numbers (0.725 to 0.900), the wing modifications produced a somewhat stronger nose-down pitching moment, a slightly higher drag at low-lift levels, and a lower drag at higher lift levels. |
| File Size | 4074554 |
| Page Count | 90 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950019962 |
| Archival Resource Key | ark:/13960/t7np70j86 |
| Language | English |
| Publisher Date | 1995-05-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Pitching Moments Subsonic Speed Computational Fluid Dynamics Transonic Wind Tunnels Pressure Distribution Transonic Speed Airfoils Aerodynamic Coefficients Lift Augmentation Wing-fuselage Stores Aircraft Models Maneuverability Drag Trailing Edges Wind Tunnel Tests Trailing Edge Flaps Leading Edges Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
