This work presents a computational study about the effect of different fossil fuels (Diesel and GTL) and renewable (Farnesane and Biodiesel) on the characteristics of the nozzle fuel internal flow (speed flow, cavitation, mass flow rate and discharge coefficient). This investigation was focused on the pass of fuel from the volume around the tip of the injector needle to the nozzle holes. Several engine-operating conditions, characteristic of urban driving conditions, were tested. These conditions, characterized by their injection pressure and injection timing as well as the experimental rates of fuel injected, were simulated with all mentioned fuels. Solenoid operated seven holes injector, 0.15 mm orifice diameter was used. Results show the effect of fuel origin on the internal flow along the nozzle orifice of the injector. Among the results obtained are the following: at medium load the effect of the needle lift on the cavitation generation is more significant than the fluid circulation velocity and fuel origin impacts as follows: Biodiesel > GTL > Farnesane > Diesel; while, at medium or high engine speed, an increase of engine load causes a decrease of cavitation generation and fuel origin impacts as follows: Diesel >> Farnesane > GTL > Biodiesel.

这项工作提供了关于不同化石燃料（柴油和GTL）和可再生能源（法呢烷和生物柴油）对喷嘴燃料内部流（速度，空化，质量流率和排放系数）特性的影响的计算研究。这项研究的重点是使燃油从喷油嘴针尖周围的体积流到喷嘴孔。测试了几种发动机操作条件，这是城市驾驶条件的特征。用所有提到的燃料模拟了这些条件，这些条件的特征在于其喷射压力和喷射正时以及所喷射燃料的实验速率。使用螺线管操作的七孔喷油嘴，喷孔直径为0.15毫米。结果表明，燃料来源对沿喷油器喷嘴孔的内部流量的影响。获得的结果如下：在中等负荷下，针升对气蚀现象的影响比流体循环速度和燃料来源的影响更为显着，如下所示：生物柴油> GTL>法尼辛>柴油；而在中等或较高的发动机转速下，发动机负载的增加会导致气穴生成的减少，并且对燃料的来源的影响如下：柴油>>法尼烷> GTL>生物柴油。