1. Laboratory of Thermal Turbomachines, National Technical University of Athens, Athens 15780, Greece, e-mail:
2. Assistant Professor Laboratory of Thermal Turbomachines, National Technical University of Athens, Athens 15780, Greece, e-mail:
3. Assistant Professor Section of Naval Architecture & Marine Engineering, Hellenic Naval Academy, Piraeus 18539, Greece, e-mail:
4. Professor Laboratory of Thermal Turbomachines, National Technical University of Athens, Athens 15780, Greece, e-mail: