A new direct approach to measuring the separation between 2 airplane wake vortices using the mean wind measurements from a short pulse Lidar in an upward looking RHI configuration was presented. The simulation analysis showed that initial circulation Γ0 can also be accurately measured after applying a correction factor. The correction factor was calculated as a function look angle to the Vortex pair centre and varies from 1.33 to 1.36 for the angles of interests. The simulation shows that there are no significant biases in the b0 measurement. The uncertainty analysis performed shows that 92 measurements per airplane type and configuration are approximately needed to meet the required uncertainty bounds of 2% for both circulation and b0 measurement uncertainties. The future work will focus on the analysis of real measurement data and use it to build airplane specific circulation decay curves.
Direct Measurement of Initial Wake Separation (b0) and Initial Circulation (Γ0) Using Pulsed Lidars
2013
7 Seiten, Bilder, 13 Quellen
Aufsatz (Konferenz)
Englisch
Zirkulation , Separation , Direktmessung , Flugzeug , Messdaten , LIDAR , Wirbelschleppe
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