Prof. Dr. S. Jeyakumar is working as a Professor in Aeronautical Engineering, Kalasalingam Academy of Research and Education, Krishnankoil, India. He has completed his Master of Engineering from Annamalai University, Annamalai Nagar, India, and a doctorate from Manonmanium Sundaranar University, Tirunelveli, India in the field of mixing and combustion in Scramjet engine combustion chambers. He has completed research projects funded by the Department of Science and Technology (DST), Govt. of India, in the field of a circular scramjet engine, and Science and Engineering Research Board (SERB), Govt. of India, in Dual combustion Ramjet (DCR) Engine which is applicable for the hypersonic missile propulsion system. An ongoing research work funded by the Aeronautical Research and Development Board (ARDB) in the field of modified DCR engine. He has published 30 peer-reviewed research papers in the field of non-reacting and reacting supersonic flow fields.