Pages 91-92
In order to make clear the effects of fuel properties on the ignition of the homogeneous and dilute diesel fuel spray made by hi-pressure injection and micro-hole nozzle, mixed fuel with n-Decane (Cetane Number : 78.8) and α-Metylnaphthalene (Cetane Number : 0) were used in this study. These mixed fuel had different Cetane Numbers but made to have same n-Decane partial equivalence ratio in fuel spray (φnD) by using different hole-diameter nozzle. The ignition delay under the condition that ignition occurred during fuel injection period (diffusion condition) depended on nozzle diameter. On the other hands in the case that ignition (premix condition) occurred after injection ignition delay depended on φnD. The combustion efficiency is also affected by φnD in the premix condition.
