连铸二冷喷嘴内部雾化效果的数值模拟分析  

The Numerical Simulation and Analysis of CC Secondary Cooling Nozzle Internal Atomization Effect

作　　者：陈光[1] 柴震[1] 宋伟[1] 李任远[1] 

机构地区：[1]安徽工业大学建筑工程学院,安徽马鞍山243032

出　　处：《广东化工》2014年第14期7-9,共3页Guangdong Chemical Industry

摘　　要：连续铸造二次冷却(连铸二冷)中常用的喷嘴为内混式气水雾化喷嘴。其所喷射的二冷水对铸坯的质量有着重要的影响。根据某钢厂所用的内混式喷嘴数据,介绍了喷嘴雾化的原理,对常用工况下喷嘴内部的喷射芯喷出的液柱破碎情况进行了理论计算。采用CFD软件建立了喷嘴的物理模型,对其内部流场进行了数值模拟。根据模拟结果,分析了液柱在不同工况下的形态变化;计算了液柱We数的模拟值并与理论值进行了对比。综合考虑液柱形态及We数,表明增加进气压力能有效提升液柱破碎的程度,工况3(水压0.2 Mpa,气压0.2 Mpa)及工况4(水压0.2 Mpa,气压0.25 Mpa)具有较好的雾化效果。The internal air-water mixing atomizing nozzle, by spraying secondary cooling water which has an important influence on the quality of billet, is commonly used in the continuous casting secondary cooling zone. According to the nozzle data of a steel plant, the atomization principle of the nozzle was introduced and the breaking of liquid column injected by the jet core inside the nozzle in common working conditions was calculated through breaking theory. A physical model of nozzle was built and the internal flow field was simulated by CFD software. According to the simulation results, the shape of liquid column in different working conditions was analyzed. A couple of We numbers of liquid column were calculated and were compared with the theoretical ones. Considering the liquid column shape and we number, it indicates that an increasing air intake pressure can effectively improve the breaking of liquid column. Working condition 3 （water pressure 0.2 Mpa, air pressure 0.2 Mpa） and Working condition 4 （water pressure 0.2 Mpa, air pressure 0.25 Mpa） have better atomization effect..

关 键 词：连铸二冷 内混式喷嘴 数值模拟 雾化 液柱破碎 

分 类 号：TF085[冶金工程—冶金物理化学]