1. The George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
2. State Key Laboratory for Turbulence and Complex System College of Engineering Peking University Beijing 100871 P. R. China
3. College of Aerospace Engineering Chongqing University Chongqing 400044 P. R. China
4. Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 P. R. China