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SODAR measurements of wind vortex strength and position

Bradley, SG, Mursch-Radlgruber, E and Von Hunerbein, S 2006, SODAR measurements of wind vortex strength and position , in: International Symposium for the Advancement of Boundary Layer Remote Sensing, July 2006, Garmisch-Partenkirchen, Germany.

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Abstract

A method is described for real-time visualisation of aircraft wing-tip vortices based on measurement data from a line array of SODARs. Every 2 s a ‘snapshot’ is taken of the atmospheric vertical velocity field above the SODARs. This provides a grid of velocity estimates at 25 m horizontal spacing and 10 m vertical spacing. These data are then fit, using non-linear least-squares, with a simple vortex model. The best fit for each velocity field image gives estimates of vortex pair strength and position, together with estimates of the accuracy of these parameters. Field results from an array of four SODARs are described, giving vortex trajectories and strength as a function of real time without dependence on assumptions regarding interactions with the atmosphere. It is found that estimates of position and spacing can be obtained to around ±4 m and of vortex circulation to ±50 m2 s-1. Recommendations are given for optimising SODARs for vortex measurements using practical technology.

Item Type: Conference or Workshop Item (Paper)
Themes: Subjects / Themes > Q Science > QC Physics > QC221-246 Acoustics - Sound
Subjects / Themes > Q Science > QC Physics > QC851-999 Meteorology - Climatology
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Acoustics Research Centre
Refereed: Yes
Depositing User: SUM Von-Hunerbein
Date Deposited: 19 Aug 2010 11:49
Last Modified: 20 Aug 2013 17:20
URI: http://usir.salford.ac.uk/id/eprint/9594

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