Experimental Investigation on Spray Characteristics of Aerodynamic Cooling Nozzle for Metal Cutting

In the different project application domain, different droplets size and velocity are required. Therefore it is very important to explore the relation of droplets size and speed with the working pressure, current capacity, spray nozzle diameter, fluid natural parameter and realize the control to droplets size and velocity. The key factor of the spray cooling is the droplets size and droplets velocity. When the droplet is smaller and its surface area is bigger, its evaporation happens more easily. The adding of the droplets velocity improves the heat exchange process in work area. In this paper, the experimental research on an air atomizing spay by Particle Dynamic Analyzer (PDA) is presented. The influence of the nozzle aperture and the air pressure on the droplets diameter was investigated, and the optimum working condition of this spray nozzle was obtained, and the base of cutting cooling is established.