(1.上海交通大学 材料科学与工程学院,上海 200030;
2.哈尔滨工业大学 材料科学与工程学院,哈尔滨 150001)
摘 要: 在铝合金熔体净化旋转喷吹技术的基础上,采用水力模拟实验研究了脉冲进气方式对气泡大小的影响。实验结果表明:脉冲进气方式有利于产生射流,使气泡变小,并增加了气泡与熔体接触的比表面积,从而改善了除氢的动力学条件,有利于提高除氢效果。
关键字: 脉冲气流;旋转喷吹;水力模拟
degassing with pulse gas current
(1.School of Materials Science and Engineering,
Shanghai Jiaotong University,Shanghai 200030,China;
2. School of Materials Science and Engineering,
Harbin Institute of Technology,Harbin 150001,China)
Abstract:Based on the technology of rotating impeller de gassing in aluminum alloy melt,the effect of pulse gas current on the gas bubble size by studied with the water modeling method. Pulse gas current can be generated by using a pulse valve in the gas transportation system. The results show that,pulse gas current is advantageous to producing efflux and decreasing the gas bubble size,thus,the contact surface area between the melt and the gas is increased and the kinetic condition of degassing for hydrogen is improved.
Key words: pulse gas current; rotating impeller degassing ; water modeling