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Effects of spoilers and gear on b-747 wake vortex velocities
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bradfute, J. G. Luebs, A. B. Ciffone, D. L. |
| Copyright Year | 1976 |
| Description | Vortex velocities were measured in the wakes of four configurations of a 0.61-m span model of a B-747 aircraft. The wakes were generated by towing the model underwater in a ship model basin. Tangential and axial velocity profiles were obtained with a scanning laser velocimeter as the wakes aged to 35 span lengths behind the model. A 45 deg deflection of two outboard flight spoilers with the model in the landing configuration resulted in a 36 percent reduction in wake maximum tangential velocity, altered velocity profiles, and erratic vortex trajectories. Deployment of the landing gear with the inboard flaps in the landing position and outboard flaps retracted had little effect on the flap vortices to 35 spans, but caused the wing tip vortices to have: (1) more diffuse velocity profiles; (2) a 27 percent reduction in maximum tangential velocity; and (3) a more rapid merger with the flap vortices. |
| File Size | 983306 |
| Page Count | 25 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770011108 |
| Archival Resource Key | ark:/13960/t44r2pf0k |
| Language | English |
| Publisher Date | 1976-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Boeing 747 Aircraft Scale Models Vortices Landing Gear Flow Measurement Flaps Control Surfaces Aircraft Wakes Flow Velocity Velocity Distribution Laser Applications Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
