Accession Number:

AD0775189

Title:

A Method of Calculating Aircraft Wake Velocity Profiles and Comparison with Full-Scale Experimental Measurements,

Descriptive Note:

Corporate Author:

AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC N J

Report Date:

1974-02-01

Pagination or Media Count:

14.0

Abstract:

A method is developed for the calculation of the initial inviscid form of rolled-up wake vortices behind a wing having arbitrary lift distribution. The method makes use of the Betz assumptions of conservation of wake vorticity and moments of vorticity. It is found that a simple relationship exists between the radial distribution of vorticity in the rolled-up wake and the spanwise lift distribution. Computed tangential velocity profiles for DC-7, DC-9, and C-141 aircraft are shown to compare favorably with profiles measured by the FAA during tower flyby tests of these aircraft in both flapped and unflapped configurations. Author

Subject Categories:

  • Aerodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE