摘要
采用数值模拟及热态燃烧实验方法,分析了3种不同集束氧枪末端几何结构在常温及高温条件下的射流速度场及温度场分布特性,并重点研究了常用枪位条件下射流动压对熔池的冲击形貌特点的影响.研究结果表明,采用收束式约束集束氧枪可有效抑制射流能量向径向的扩散,从而延长伴随流高温区长度,达到提高超音速射流核心段长度及熔池搅拌效果的目的.
Coherent lances have been playing an extremely important role in the process of supplying oxygen to an electrical arc furnace,which has been widely used in metallurgy,and its metallurgical and operational benefits have been well reported.When compared with the conventional supersonic oxygen lance,the coherent lance could increase the oxygen utilization rate,strengthen penetration ability,and achieve a good stirring effect.However,there was limited research about the flow field characteristics of a coherent jet using different restriction structures for a coherent lance tip.This paper analyzed velocity and temperature profiles at various parameters and conditions.Both numerical simulation and combustion experiment have been carried out to investigate the velocity and temperature profiles using three kinds of restriction structures at room and high ambient temperature conditions.Further,the impact diameter and depth of the molten bath have also been analyzed at a certain lance height.The result shows that the restriction structure could delay energy transmission in a radial direction,which enlarges a high-temperature zone in an axial direction,resulting in the increase of the velocity potential core length and the improvement of the mixing ability of the main oxygen jet.
作者
魏光升
朱荣
陈书江
刘福海
董凯
姚柳洁
WEI Guang-sheng;ZHU Rong;CHENG Shu-jiang;LIU Fu-hai;DONG Kai;YAO Liu-jie(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of Fluid Interaction with Material(Ministry of Education),University of Science and Technology Beijing,Beijing 100083,China;Yanzhou Gaolida Co.Ltd.,Yanzhou 225800,China;National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2020年第S01期76-82,共7页
Chinese Journal of Engineering
基金
国家自然科学基金资助项目(51804028)
中央高校基本科研业务资助项目(FRF-TP-17-007A1)。
关键词
集束射流
流场
燃烧试验
数值模拟
coherent lance
flow field
numerical simulation
combustion experiment
