Characterization of an experimental turbulent vortex in the physical and spectral spaces

We present an experiment where a stretched vortex is experiencing quasi-periodical turbulent bursts inside a laminar environment. In previous studies (Cuypers et al., 2003 Phys. Rev. Lett., 91, 194502, Cuypers et al., 2004 J. Turb., 5), the classical k^−5/3 decay of the spectrum resulting from the evolution of this burst has been characterized and interpreted in the framework of Lundgren's mechanism (Lundgren 1982 Phys. Fluids 25 2193). In this paper, the flow is further characterized in both the physical and the spectral spaces using a statistical exploitation of phase averaged particle image velocimetry measurements.