1. Associate Professor, Propulsion and Thermal Systems Laboratory, Thermodynamic and Propulsion Systems Section, Hellenic Air Force Academy, Dekelia Air Force Base, Attiki, Greece (corresponding author).
2. Professor, School of Mechanical Engineering, National Technical Univ. of Athens, 15780 Athens, Greece.
3. Associate Professor, Dept. of Mechanical Engineering, Mississippi State Univ., 210 Carpenter Bldg., Mississippi State, MS 39762.
4. Research Associate, School of Mechanical Engineering, National Technical Univ. of Athens, 15780 Athens, Greece.