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Proceedings Paper

Properties of aircraft wake vortices measured by ground-based continuous-wave Doppler lidar
Author(s): Friedrich Koepp
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Paper Abstract

The DLR ground-based cw Doppler lidar has been developed for wind and turbulence measurements in the Atmospheric Boundary Layer. Moreover, it is used for experimental investigations of aircraft wake vortices. By the present paper measurements of wake vortices generated by military-type fixed-wing as well as rotor-wing aircraft will be presented. The experimental data has been analyzed regarding the structure and circulation of wake vortices, partly also regarding their temporal development. The influence of flight parameters has been measured during several consecutive fly-bys. Small variations in the velocity profiles could be observed which were overlayed by the signatures of the variable wind and turbulence field, a problem which can only be solved by statistical treatment. The influence of the aircraft design could be demonstrated by comparison of the vortex signatures generated by two B707-type aircraft with pronounced differences in aircraft design.

Paper Details

Date Published: 28 May 1999
PDF: 6 pages
Proc. SPIE 3707, Laser Radar Technology and Applications IV, (28 May 1999); doi: 10.1117/12.351345
Show Author Affiliations
Friedrich Koepp, DLR (Germany)

Published in SPIE Proceedings Vol. 3707:
Laser Radar Technology and Applications IV
Gary W. Kamerman; Christian Werner, Editor(s)

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