The purpose of this study was to investigate the effect of the number of spiral paths on the spray cone angle, discharge coefficient and droplet diameter in pressure-swirl atomizer with spiral paths using numerical and experimental methods. Initially, the injector was designed and manufactured based on some assumptions such as operating fluid type, pressure difference, spray cone angle and mass flow rate and then tested. Comparison of test results with design assumptions showed that mass flow rate and spray cone angle and discharge coefficient were 5%, 13.25% and 4% error, respectively. Then, numerical solution method was used for numerical investigation of the influence of geometric parameters. To simulate the two-phase flow, the fluid volume fraction model was used. The numerical solution of mass flow rate and spray cone angle and discharge coefficient showed 7.4%, 9.5% and 11.76% error, respectively. The results showed that the pressure-swirl atomizer with spiral paths has a conical shape and is hollow. Also, the total velocity and its components on the edge of the spray cone have the highest value. Investigations showed that at constant mass flow rate with increasing the torsion of spiral path, the total radial, axial and tangential velocities increased, which increased the spray cone angle and decreased the droplet diameter.

这项研究的目的是使用数值和实验方法研究螺旋路径的数量对压力螺旋旋流雾化器中喷雾锥角，排放系数和液滴直径的影响。最初，根据一些假设（例如工作流体类型，压差，喷雾锥角和质量流量）设计和制造喷油器，然后进行测试。测试结果与设计假设的比较表明，质量流量，喷雾锥角和排放系数分别为5％，13.25％和4％误差。然后，采用数值解法对几何参数的影响进行数值研究。为了模拟两相流，使用了流体体积分数模型。质量流量，喷雾锥角和排放系数的数值解分别显示了7.4％，9.5％和11.76％的误差。结果表明，带螺旋路径的压力旋流雾化器呈圆锥形且中空。而且，总速度及其在喷雾锥边缘上的分量具有最高值。研究表明，在恒定质量流量下，随着螺旋路径扭曲的增加，总的径向，轴向和切向速度增加，从而增加了喷雾锥角并减小了液滴直径。