1. Laboratory of Fluid Mechanics & Turbomachinery, Department of Mechanical Engineering, Aristotle University of Thessaloniki, Building D, 9th Floor, Aristotle University Campus, Thessaloniki 541 24, Greece e-mail:
2. Technological Educational Institute (TEI) of Central Macedonia, Terma Magnesia Serres 621 24, Greece e-mail:
3. MTU Aero Engines AG, Dachauer Strasse 665, Munich 80995, Germany e-mail:
4. Laboratory of Fluid Mechanics & Turbomachinery, Department of Mechanical Engineering, Building D, 9th Floor, Aristotle University Campus, Aristotle University of Thessaloniki, Thessaloniki 541 24, Greece e-mail: