小方坯结晶器水温水速对传热过程影响  

Influence of inlet cooling water temperature and velocity on billet mold heat transfer

作　　者：彭尊[1,2] 包燕平[1] 梅宁[3] 杨利康 张峰[4] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学国家板带生产先进装备工程技术研究中心,北京100083 [3]首钢京唐钢铁联合有限责任公司,唐山063200 [4]杭州钢铁集团公司,杭州310022

出　　处：《工程科学学报》2015年第7期889-895,共7页Chinese Journal of Engineering

基　　金：国家自然科学基金资助项目(51274029);教育部博士点专项基金资助项目(20130006110023)

摘　　要：通过建立结晶器内钢液和水的二维对流-传热耦合模型过程,研究了小方坯结晶器冷却水入口温度和流速对铜管温度和结晶器内平均热流的影响.该模型使用Fluent进行求解,模拟了钢液和冷却水的流动和传热,凝固坯壳的生长,以及热量以辐射和导热两种通过保护渣和气隙.通过将坯壳厚度和铜管温度与其他研究的结果进行对比来验证模型准确性.研究结果表明,结晶器冷却水的温度显著影响铜管的冷面温度,水温超过313 K会导致铜管冷面最高温度超过水的沸点.水流速升高0.49 m·s-1能够消除水温升高4 K带来的不利影响.A two dimensional coupled model of fluid flow and heat transfer of liquid steel and water in a mold was established to investigate the influence of inlet cooling water temperature and velocity on the mold tube temperature field and average mold heat flux.Solved by Fluent,this model simulated the flow and heat transfer of liquid steel and cooling water,solidified shell growth,and heat transfer across air gap and mold fluxes by conduction and radiation. The model＇s accuracy was verified by comparing the shell thickness and copper tube temperature field with other researches. Model results suggest that the inlet cooling water temperature notably affects the cold face temperature of the copper tube. If the inlet cooling water temperature exceeds 313 K,the highest temperature of the cold face will surpass the boiling point of water. However,an increase of 0. 49 m·s- 1in water velocity can diminish the adverse effects of an increase of 4 K in inlet cooling water temperature.

关 键 词：结晶器 流体流动 传热 耦合模型 冷却水温 

分 类 号：TF777.3[冶金工程—钢铁冶金]