Chair of Fluid Mechanics, University of Siegen, Paul-Bonatz-Straße 9-11, 57076 Siegen-Weidenau, Germany and Institute of Technology, Resource and Energy-efficient Engineering (TREE), Bonn-Rhein-Sieg University of Applied Sciences, Grantham-Allee 20, 53757 Sankt Augustin, Germany
Department of Engine Acoustics, German Aerospace Center, Bismarckstraße 101, 10625 Berlin, Germany
