Effects of Key Structure of Pressure Swirl Nozzle on Atomization Performance

The structure of the pressure swirl nozzle is key factor affecting atomization quality. Optimal design conducive to improving quality and has important significance for efficiency stability combustor. effect section diameter, contraction angle, straight expansion angle on spray cone liquid film thickness studied by numerical simulation. results show that both decrease with increase angle. As diameter increases, increased. Both have an optimal value 60° 45°, respectively. in ratio can axial velocity. When outlet reduced. 30°, 4 mm, 12 respectively, performance this best.