Woodruff School of Mechanical Engineering



Effect of Injection Rate Shaping Over Diesel Spray Development in Non-Reacting Evaporative Conditions


Prof. Raul Payri


CMT Motores Termicos, Universitat Politecnica de Valencia


Friday, April 12, 2019 at 10:00:00 AM


Montgomery Knight Building, Room 317


Dr. Caroline Genzale


In this research, a complete characterization of a direct acting injector is presented including hydraulic characterization with x-ray needle lift measurements, injection rate and spray momentum. Additionally, liquid and vapor phase penetrations in a high pressure and temperature vessel in nitrogen atmosphere were measured. In this type of injectors, a new controlling parameter have huge effect over the spray properties that is the piezo stack voltage (directly controls the needle lift and rate of injection). Other controlling variables (injection pressure, back pressure, ambient temperature) are consistent with the liquid and vapor dependency found in the literature.


Prof. Raul Payri graduated as an industrial engineer in 1995. He completed his doctoral thesis in 1999 obtaining one of the six awards of the 130 theses defended that year. Teaching since 1998 he became Full Professor at UPV in 2009. Dr. Payri is currently the manager of the injection group formed by 30 engineers. He has worked in more than 150 research projects. The dissemination of results has taken place over the publication of more than 200 contributions. His h-citation index in WoS is 30. Nowadays, Dr Payri is the editor of the International Journal of Engine Research.