1. Center
for Combustion Energy, Tsinghua University, Meng Minwei Science Technology Building, Zhishan Road, Beijing 100084, China
2. Key
Laboratory for Thermal Science and Power Engineering of the Ministry
of Education, Tsinghua University, Mechanical Engineering Building, Tsinghua Road, Beijing 100084, China
3. Department
of Mechanical and Aerospace Engineering, Princeton University, Olden Street, Princeton, New Jersey 08544, United States