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Modal analysis of wingtip vortices by means of Proper Orthogonal Decomposition

This paper discusses the influence of different wingtip geometries on the first eigenmodes of wingtip vortices. With the use of Proper Orthogonal Decomposition (POD) of a turbulent velocity field, a modal decomposition of coherent structures, high energetic eigenmodes are determined. Based on the results found by Fabre et al. [1], these eigenmodes may be a key factor for the stability analysis. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)