2003 Volume 65 Issue 2 Pages 120-125
The size of droplets of vegetable oil spray injected from the injection nozzle plays a significant role in the performance of diesel engines. Three kinds of the injection nozzles are used according to type of the combustion chamber the diesel engine: pintle, throttle and hole nozzles. In the experiments we used these nozzles and, as substitution fuels, vegetable oil and the mixture of diesel oil and vegetable oil. This paper deals with the relationship between the droplet size of the injected spray and the injection pressure.
The results show that there was at each injection pressure a logarithmical relationship between the kinematic viscosity of fuels and the mean size of droplets of the spray injected from all injection nozzles. When the injection pressure increased the mean size of droplets decreased: 14MPa of the throttle nozzle, and 20MPa of the two kinds of hole nozzles seemed to be threshold value of the spray atomization respectively.
