1. Professor, College of Aerospace Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China (corresponding author).
2. Research Assistant, College of Aerospace Engineering, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China.
3. Professor, Computational Fluid Dynamics Laboratory, School of Engineering, Univ. of Glasgow, Glasgow G12 8QQ, Scotland, UK.