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H型钢气雾冷却换热特性的数值模拟 被引量:2
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作者 边新孝 李苗苗 +2 位作者 伏世帅 朱冬梅 刘国勇 《上海金属》 CAS 北大核心 2018年第5期104-110,共7页
利用轧后余热对H型钢进行在线热处理,既能提高强度,又可以节约能源。但是由于H型钢结构复杂,导致其轧制后冷却不均匀,从而产生过大的残余热应力。喷嘴位置固定,采用Fluent软件数值仿真,研究了气雾冷却过程中700×350 H型钢不同部位... 利用轧后余热对H型钢进行在线热处理,既能提高强度,又可以节约能源。但是由于H型钢结构复杂,导致其轧制后冷却不均匀,从而产生过大的残余热应力。喷嘴位置固定,采用Fluent软件数值仿真,研究了气雾冷却过程中700×350 H型钢不同部位的表面换热系数,得出,随着气压的增大,换热系数增大,但喷嘴流量和直径对换热效果的影响没有一定规律。在此基础上,又优化了气雾喷射参数,分析了几种工况下的温度场,最终得出,在水流量L1=0. 05 kg/s、L2=0. 1 kg/s、L3=0 kg/s,喷嘴气压为0. 3 MPa的条件下,700×350 H型钢的温度场最为均匀。 展开更多
关键词 H型钢 气雾冷却 数值模拟 换热系数
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Determining the Boundary of Molten Electrolyte and Aluminum in Electrolytic Cells by Detecting Their Vertical Distribution of Potential
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作者 CHANG Liming ZHANG Zhaohui +4 位作者 ZHAO Xiaoyan bian xinxiao ZUO Zengyang LU Hui LAO Dabao 《Instrumentation》 2022年第3期59-64,共6页
Aluminum production is a high energy consumption process so that maintaining fundamental compositions in balance and optimal conditions are essential.The molten electrolyte and melted aluminum are primary materials an... Aluminum production is a high energy consumption process so that maintaining fundamental compositions in balance and optimal conditions are essential.The molten electrolyte and melted aluminum are primary materials and their boundary needs to be monitored from time to time.An automatic measurement technic is presented in the paper to substitute for the traditional manual measurement work that is dull,poor efficiency and dangerous for operators.The boundary forming mechanism is analyzed,the vertical profile of electric potential is simulated,an automatic instrument is developed to sense the potential distribution,and a strategy is provided to identify the boundary according to the potential curves.Finally,some practical results are compared with manual measurements,which shows good consistency. 展开更多
关键词 Aluminum Electrolytic Cell Boundary of Molten Materials Electric Potential Distribution Measurement Online
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