(1.上海交通大學(xué) 材料科學(xué)與工程學(xué)院，上海 200030；
2.哈爾濱工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，哈爾濱 150001)
摘 要: 在鋁合金熔體凈化旋轉(zhuǎn)噴吹技術(shù)的基礎(chǔ)上，采用水力模擬實驗研究了脈沖進(jìn)氣方式對氣泡大小的影響。實驗結(jié)果表明：脈沖進(jìn)氣方式有利于產(chǎn)生射流，使氣泡變小，并增加了氣泡與熔體接觸的比表面積，從而改善了除氫的動力學(xué)條件，有利于提高除氫效果。
關(guān)鍵字: 脈沖氣流；旋轉(zhuǎn)噴吹；水力模擬
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
