1. School of Hydraulic, Energy and Power Engineering; Yangzhou University; Yangzhou Jiangsu 225127 P.R. China
2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education; School of Energy and Environment; Southeast University; Nanjing Jiangsu 210096 P.R. China
3. George W. Woodruff School of Mechanical Engineering; Georgia Institute of Technology; Atlanta GA 30332