1. Professor Mem. ASME Aerodynamics and Flight Mechanics Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK e-mail:
2. Professor Mem. ASME Aero-Thermal Systems, GE Global Research, Munich D-85748, Germany e-mail:
3. Aerodynamics and Flight Mechanics Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK