Ground-Based Measurements of the Wake Vortex Characteristics of a B747 Aircraft in Various Configurations. Meeting Paper AIAA-1977-9, Research Engineering, NASA Dryden Flight Research Center

Hallock, J.N. and Burnham, D.C. and Tombach, I.H. and Brashears, M.R. and Zalay, A.D. and Barber, M.R. (1977) Ground-Based Measurements of the Wake Vortex Characteristics of a B747 Aircraft in Various Configurations. Meeting Paper AIAA-1977-9, Research Engineering, NASA Dryden Flight Research Center.

Full text available as: PDF - Requires Adobe Acrobat Reader or other PDF viewer.

Abstract

A Boeing 747 aircraft flew 54 passes at low level over ground-based sensors. Vortex velocities were measured by a laser-Doppler velocimeter, an array of monostatic acoustic sounders, and an array of propeller anemometers. Flow visualization of the wake was achieved using smoke and balloon tracers. Preliminary results were obtained on the initial downwash field, the time for merging of the multiple vortices, the velocity fields, vortex decay, and the effects of spoilers and differential flap settings on the dissipation and structure of vortices.

EPrint Type:	Other
Keywords:	B747 aircraft
Subjects:	Aircraft/Project: Boeing 747
ID Code:	1636
Deposited On:	19 June 2007
Additional Information:	9 pages. AIAA 15th Aerospace Sciences Meeting, Los Angeles, California, January 24-26, 1977.