Numerical studies of sprays impacting normally on an infinite plate

The transportation process of industrial impacting sprays onto an infinite target plate has been studied numerically using the concept of inertial imp action with a 3-D transient computational fluid dynamics code. The effect o f turbulent dispersion on the structure of sprays is investigated. Three pa tterns of impacting sprays, namely, weak, transition, and strong sprays,wit h respect to dimensionless stopping distances (the ratio of stopping distan ce to impacting distance) of lambda/1 < I, I less than or equal to lambda/1 < 2, and lambda/1 greater than or equal to 2, respectively, are analyzed T he mechanism of spray transportation onto the target plate is also studied. rin inertial impaction parameter K for ir,impacting sprays is defined in t erms of the momentum conservation to reveal the relation between spray tran sportation and aerodynamic conditions. Results indicate that the transfer e fficiency of impacting sprays ol2to the plate is a function of the impactio n parameter and the transfer efficiency increases greatly with the increase of impaction parameter Uniform and log-normal distributions of sprays are accepted for comparison. Transfer efficiency of real sprays is higher than that of uniform sprays, and the difference gradually decreases as the impac tion parameter increases.