Quantification of coflow effects on primary atomization of pressure swirl atomizers

Extension of high momentum jet stabilised combustors towards liquid fuel operation has shown significant injector shape and injection strategy impact on the air mixing behaviour, flame position stability ultimately pollutants. This can be attributed to lack optimised concepts as well fundamental understanding turbulence–spray interactions that dictate atomization placement in turbulence gas flow conditions. The current work uses a canonical channel investigate bilateral between highly turbulent coaxial primary process spray generated by pressure-swirl atomizers. A novel two-phase particle image velocimetry (PIV) method with phosphor-particles is developed enable field measurements near gas–liquid interface dilute region. In addition, shadowgraphy technique applied detect disturbances sheet surface. Liquid replaced deionised water due safety concerns velocity varied from 0 80 m/s. results show influence aerodynamic forces growth rate increasing coflow velocities. induces an advanced breakup comparable thick sheets at large Weber numbers. PIV enabled quantification kinetic energy transfer phases strongly dependent slip interface. These findings assist ongoing development systems for based provide validation data numerical simulations atomization.