1. School of Energy and Power Engineering Beihang University Beijing 100191 China
2. National Key Laboratory of Science and Technology on Aero–Engines Aero-thermodynamics Beijing 102206 China
3. School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu 611730 China
4. Department of Mechanical Engineering University of California Berkeley, CA 94720‐1740 USA