1. Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ 85721
2. Department of Aerospace and Mechanical Engineering, The University of Arizona, Tucson, AZ 85721 e-mail:
3. School of Energy, Power, and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
4. Department of Chemical and Environmental Engineering, The University of Arizona, Tucson, AZ 85721