Characteristics of trans-critical propane spray discharged from multi-hole GDI injector

This paper is to investigate the characteristics of trans-critical propane spray compared with the flash boiling spray ejected from a multi-hole injector in a constant volume chamber by using the Schlieren and backlit imaging methods. The fuel temperature (Tf) is set from 30 °C to 120 °C, injection pressure (pf) from 60 bar to 120 bar and ambient pressure (pa) from 0.2 bar to 10 bar. The results show that the trans-critical spray has longer...