Gas Atomization of Aluminium Melts: Comparison of Analytical Models

Metals

关键词: Al alloys;    gas atomization;    spray forming;    two phase flow;    liquid break up;    surface wave formation;   

DOI  :  10.3390/met2020202

来源: mdpi

【 摘 要 】

A number of analytical models predicting the size distribution of particles during atomization of Al-based alloys by N₂, He and Ar gases were compared. Simulations of liquid break up in a close coupled atomizer revealed that the finer particles are located near the center of the spray cone. Increasing gas injection pressures led to an overall reduction of particle diameters and caused a migration of the larger powder particles towards the outer boundary of the flow. At sufficiently high gas pressures the spray became monodisperse. The models also indicated that there is a minimum achievable mean diameter for any melt/gas system.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.