No abstract

The present study investigates fuel spray penetration and opening angles for EN 590 light fuel oil, kerosene, hexane, methanol, and propane. Furthermore, droplet sizes are studied for methanol and light fuel oil sprays from a single location at the edge of the sprays. The fuels were injected from a marine-size common rail diesel injector to a spray chamber filled with nitrogen, and the results were based on the analysis of shadow images. The results indicated that propane sprays would penetrate slower and less than the sprays of the other fuels, but that the differences are decreased and finally almost disappeared when increasing chamber density. Apart from the lowest tested chamber density of 1.2 kg/m 3 , propane formed significantly narrower sprays than the other fuels. With the exception of propane, the fuels had mostly similar responses to increased chamber densities. Variations between repetitions were large in relation to the differences in average values between the liquid fuels. Concerning droplet size measurements, the results suggested that methanol sprays would be characterized by slightly smaller droplet sizes than LFO sprays in the tested conditions. This finding is in line with an earlier study, albeit the found differences were smaller.