SODAR measurements of wind vortex strength and position

Bradley, SG; Mursch-Radlgruber, E; von Hünerbein, S

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.

Citation

Bradley, S., Mursch-Radlgruber, E., & von Hünerbein, S. (2006, July). SODAR measurements of wind vortex strength and position. Presented at International Symposium for the Advancement of Boundary Layer Remote Sensing, Garmisch-Partenkirchen, Germany

• Presentation Conference Type: Other
• Conference Name: International Symposium for the Advancement of Boundary Layer Remote Sensing
• Conference Location: Garmisch-Partenkirchen, Germany
• Start Date: Jul 1, 2006
• Publication Date: Jul 20, 2006
• Deposit Date: Aug 19, 2010
• Publisher URL: https://publikationen.bibliothek.kit.edu/270065296/3814834
• Additional Information: Event Type : Conference