1. Research Associate, School of Mechanical Engineering, National Technical Univ. of Athens, 15780 Athens, Greece.
2. Professor, School of Mechanical Engineering, National Technical Univ. of Athens, 15780 Athens, Greece (corresponding author).
3. Associate Professor, Propulsion and Thermal Systems Laboratory, Thermodynamic and Propulsion Systems Section, Hellenic Air Force Academy, Dekelia Air Force Base, Attiki, Greece.
4. Associate Professor, School of Mechanical Engineering, National Technical Univ. of Athens, 15780 Athens, Greece.