As far as we are aware, all the previous studies have focused on circular injectors. Here, the effect of non-circular orifice shape on pressure swirl injector was investigated experimentally. For this purpose, three injectors; circular, square and rectangular were manufactured. The nozzles had the same cross-sectional area. Water was used as the working fluid and tests were conducted at room temperature and pressure. The Weber number varied from 484 to 1936. Flow parameters of the swirl jets were obtained by an in-house image processing code. The measured parameters were: discharge coefficient, spray angle, breakup length, lateral spread, SMD of drops and wavelength of surface waves formed on the cone. The influence of nozzle shape on all these parameters are discussed.

中文翻译：

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非圆形压力涡流喷嘴喷射到静止空气中

据我们所知，之前的所有研究都集中在圆形喷射器上。这里，通过实验研究了非圆形孔口形状对压力旋流喷射器的影响。为此，需要三个喷油器；制造了圆形、方形和矩形。喷嘴具有相同的横截面积。使用水作为工作流体，并在室温和压力下进行测试。韦伯数从 484 到 1936 不等。旋流射流的流动参数通过内部图像处理代码获得。测量的参数有：流量系数、喷雾角度、破碎长度、横向扩散、液滴的SMD以及锥体上形成的表面波的波长。讨论了喷嘴形状对所有这些参数的影响。