Numerical Simulation and Experimental Study on Atomization Process of Aluminum Alloy Powder

Numerical simulation and experimental verification were used to study the atomization process of aluminum alloy powder by high-speed rotating disk. The spreading motion characteristics of melt on different disk surfaces, the breaking law of melt thin liquid film, and the flight cooling of droplets formed after crushing were investigated. The results show that the slip of liquid film on the surface of the spherical disk is smaller, the liquid film spreads more evenly, and the heat transfer of the disk is more stable. Under the same working conditions, the continuous liquid film boundary diameter of the spherical disk increases by about 40%, the maximum liquid film velocity increases by about 19%, the median diameter D-50 of atomized droplets decreases by about 12.3%; meanwhile, the droplet size distribution is more concentrated. The size and distribution of atomized droplets can be controlled more efficiently.