1. Department of Mechanical Engineering, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260
2. Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen 518055, China
3. Department of Aerodynamics, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Yudao Street, Nanjing 210016, Jiangsu, China
4. Department of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China