The new blended fuel (gasoline/hydrogenated catalytic biodiesel) is expected to address the cold start problem under low\ntemperature of gasoline compression ignition due to its excellent ignition performance. Additionally, its spray behavior as the\ncombustion boundary condition could have a direct impact on the characteristics of subsequent combustion. Therefore, the\nobjective of this study is to reveal the effects of hydrogenated catalytic biodiesel/gasoline on the spray characteristics under various\nambient conditions. As a significant index of spray characteristics, the spray penetration was achieved by applying Mie scattering\nmethods under nonevaporation and evaporation conditions on a constant volume combustion chamber. In addition, the experimental\nresults were compared against the calculated values of the models. As demonstrated by the results, a better spray\nperformance can be achieved by the blended fuel than diesel and hydrogenated catalytic biodiesel. In respect of spray penetration,\nthere is almost no difference among the three fuels under the ambient temperature of 323 K. Nevertheless, the blended fuel is lower\nthan that of hydrogenated catalytic biodiesel and diesel when the ambient temperature is 434 K and 523 K. Moreover, the blended\nfuel is the first to reach the stable state, and the hydrogenated catalytic biodiesel is earlier than diesel for the spray penetration.\nMeanwhile, the spray model is identified as suitable for the blended fuel.
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