A novel solid atomization technology, which using high velocity gas jet stream rich in solid salt particles as atomization medium, was developed. The results show that using this novel atomization process can produce ...A novel solid atomization technology, which using high velocity gas jet stream rich in solid salt particles as atomization medium, was developed. The results show that using this novel atomization process can produce various metal and alloy powders with finer particle size, finer microstructures and higher cooling rate than those powders produced by the conventional gas atomization technology.展开更多
Numerical simulations have been carried out to investigate the liquid atomization and spray process using the Discrete Phase Model of the commercial CFD code combined with the Wall-Film boundary conditions. The effect...Numerical simulations have been carried out to investigate the liquid atomization and spray process using the Discrete Phase Model of the commercial CFD code combined with the Wall-Film boundary conditions. The effects of spray parameters on droplets Santer mean diameter （SMD）, droplet collision speed, the thickness of liquid-film, the surface temperature and its uniformity were analyzed in the present study. The simulation results and the experimental data obtained in the available literature agree within 13.8%, The computational results show that the spray pressure is the main factor to realize the atomization. Increasing the mass flux and the spray pressure, the droplet collision speed increases while the corresponding maximum film thickness on the heated surface declines. The surface temperature changes indistinctively with the increase of the spray distance, but the temperature distribution tends to be uniform.展开更多
文摘A novel solid atomization technology, which using high velocity gas jet stream rich in solid salt particles as atomization medium, was developed. The results show that using this novel atomization process can produce various metal and alloy powders with finer particle size, finer microstructures and higher cooling rate than those powders produced by the conventional gas atomization technology.
基金supported by National Natural Science Foundation of China (No.50776087).
文摘Numerical simulations have been carried out to investigate the liquid atomization and spray process using the Discrete Phase Model of the commercial CFD code combined with the Wall-Film boundary conditions. The effects of spray parameters on droplets Santer mean diameter （SMD）, droplet collision speed, the thickness of liquid-film, the surface temperature and its uniformity were analyzed in the present study. The simulation results and the experimental data obtained in the available literature agree within 13.8%, The computational results show that the spray pressure is the main factor to realize the atomization. Increasing the mass flux and the spray pressure, the droplet collision speed increases while the corresponding maximum film thickness on the heated surface declines. The surface temperature changes indistinctively with the increase of the spray distance, but the temperature distribution tends to be uniform.
