1. Department of Hydraulic Machinery, “Politehnica” University of Timisoara, Bvd. Mihai Viteazu 1, RO-300222 Timisoara, Romania
2. Center for Advanced Research in Engineering Science, Romanian Academy–Timisoara Branch, Bvd. Mihai Viteazu 24, RO-300223 Timisoara, Romania
3. Laboratory for Hydraulic Machines, École Polytechnique Fédérale de Lausanne, Avenue de Cour 33Bis, CH-1007 Lausanne, Switzerland