The objective of this study was to investigate the effects of the geometric parameters of a pressure-swirl duplex nozzle (dual orifice) on the spray characteristics of Jet A-1 fuel. Two pilot nozzles with different shapes and two main nozzles with different shapes were tested. The spray characteristics were analyzed by employing laser diagnostic techniques, namely a phase Doppler particle analyzer (PDPA) and planer laser sheet imaging. Atomizer performance including flowrate, discharge coefficient, spray structure, resulting droplet size, and velocity distribution were analyzed. The results compared the atomization characteristics under various injection conditions and nozzle geometry that showed considerable major alteration in spray characteristics. This type of atomizers is mainly used as fuel injectors in gas turbine combustors. Hence, the results could be of interest to the combustion society, although this research is entirely cold flow.

中文翻译：

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旋流双喷嘴内部几何形状对JET A-1燃料雾化特性的影响

这项研究的目的是研究压力旋流双工喷嘴（双孔口）的几何参数对Jet A-1燃油喷雾特性的影响。测试了具有不同形状的两个引燃喷嘴和具有不同形状的两个主喷嘴。通过使用激光诊断技术，即相位多普勒颗粒分析仪（PDPA）和平面激光片成像，分析了喷雾特性。分析了雾化器的性能，包括流量，排放系数，喷雾结构，产生的液滴尺寸和速度分布。结果比较了在各种喷射条件和喷嘴几何形状下的雾化特性，这些雾化特性显示了喷雾特性的重大变化。这种类型的雾化器主要用作燃气轮机燃烧器中的燃料喷射器。因此，