基于Fluent非稳态模型工作辊精细冷却参数研究  

Numerical study on parameters of multi-zone cooling for work roll based on unsteady VOF model of Fluent

作　　者：曹建国[1] 覃业均[1] 张杰[1] 宋木清[2] 宫贵良[2] 彭强[2] 

机构地区：[1]北京科技大学机械工程学院,国家板带生产先进装备工程技术研究中心,北京100083 [2]武汉钢铁集团公司,湖北武汉430083

出　　处：《中南大学学报（自然科学版）》2011年第12期3742-3747,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(59835170);北京科技大学科技发展专项基金资助项目(20050311890)

摘　　要：为了提高宽幅冷轧薄板板形尤其是边中复合浪等高次复杂浪形的控制能力,研究工作辊精细冷却喷射梁的结构参数及其安装尺寸对精细冷却效果的影响。采用流体建模软件ANSYS Fluent建立工作辊精细冷却的三维VOF非稳态模型,分析精细冷却喷嘴孔口特征比、喷嘴到工作辊距离和喷嘴之间的距离对工作辊冷却效果的影响。仿真结果表明:喷嘴孔口特征比较小时,射流轴线速度衰减慢;利用射流在特征衰减区的特性合理控制冷却喷射梁喷嘴与工作辊之间的距离可提高精细冷却效率;喷嘴间距适度减小可使控制区域的工作辊温度场冷却效果更均匀并提高精细冷却效率。In order to enhance the controllability of profile and flatness for ultra-wide cold-rolled strip,especially the complex waves such as the center buckle with edge wave,the effect of the structural parameters and assembly dimensions of spray header of multi-zone cooling on the coefficient of heat transfer and the temperature distribution of work rolls was studied.The 3-Dimensional unsteady VOF models were built up by ANSYS Fluent flow modeling software to simulate and analyze the multi-zone cooling performances according to the different parameters such as the characteristic ratio of nozzle outlet,the distance dimension between nozzle and work roll（WR） and the distance dimension between adjacent nozzles.The results show that the axis velocity of jet flow drops slowly with a smaller characteristic ratio of nozzle outlet.To determine the distance reasonably between nozzles and work rolls is an effective way to increase the multi-zone cooling efficiency by taking advantage of the cooling performance in characteristic decay region.The uniform cooling effect on the desired partial zones of WR temperature field can be obtained by a smaller distance between adjacent nozzles that is another effective way to increase the multi-zone cooling efficiency.

关 键 词：冷轧 轧辊 板形 精细冷却 有限元分析 数学模型 

分 类 号：TQ018[化学工程]