喷射沉积Si-Al合金的数值模拟结果与分析

Numerical Simulation and Analysis of Spray-Deposited Silicon-Aluminum Alloys

采用热辐射修正,模拟了喷射沉积Si-Al合金的凝固过程,研究了熔滴的速度、热交换作用系数、温度、熔滴冷却速度及固相分数与沉积距离的关系,讨论了辐射相修正前后熔滴的温度和固相分数的变化以及雾化压力和沉积距离对固相分数的影响.

The numerical simulation of solidification processing for Si-Al alloys prepared by spray forming was adopted by considering heat radiation in the cooling process of droplets. A relationship among droplet velocity, heat transfer coefficient, droplet temperature, cooling velocity of droplets, solid fraction and axial distance was acquired. The variations of droplet temperature and solid fraction before and after heat radiation is considered. The influence of atomization pressure and axial distance on solid fraction was also discussed.