Abstract
Experimental ignition delays of ethanol, PRF 90 and ethanol – PRF 90 blend fuels were measured using a rapid compression machine at an equivalence ratio of 1.0 with oxygen concentrations 8～16% in nitrogen, and argon, in the temperature range 862～911 K and pressure range 2.52～2.73 MPa. The measured ignition delays were compared with the numerical predictions. The ignition delays for ethanol were found to decrease with an increase in the temperature and the simulated ignition delays using the detailed PRF kinetic model constructed by KUCRS, which included the ethanol oxidation mechanism, were in reasonable agreement with those obtained from experiments. The addition of ethanol to PRF 90 increased the ignition delays with oxygen concentrations 12, 16%, while the ignition delays were almost kept constant with oxygen concentration 8%. We found that the oxygen concentration had influence on the ignition characteristics of ethanol-PRF blend fuels.
