连续式工业炉内的流动与传热特性模拟研究  

Numerical Simulation of Fluid Flow and Heat Transfer in an Industrial Continuous Furnace

作　　者：王花蕾[1] 吴雪莹 WANG Hualei;WU Xueying(Yangling Vocational&Technical College,Xianyang 712100,China;College of Transportation and Engineering,Chang'an University,Xi'an 710064,China)

机构地区：[1]杨凌职业技术学院,陕西咸阳712100 [2]长安大学运输工程学院,陕西西安710064

出　　处：《工业加热》2021年第11期35-38,共4页Industrial Heating

基　　金：陕西省科技攻关项目(2013GY2-03)。

摘　　要：采用Fluent软件对连续式电弧焊电极工业炉内的瞬态传热和湍流流动进行了三维模拟计算。在模拟中由于电极与炉体尺寸上的巨大差异、电极的运动以及各种复杂的传热方式都将影响模拟精度和效率。为了克服这些困难,采用了两步建模策略。首先,利用热等效模型简化了电极的几何结构和材料组成。其次,通过对固定区域施加时间相关的边界条件,避免了电极在炉内的移动。模拟结果表明,对于现有的工业炉来说其输入空气在塔板之间不能有效地循环,从而这降低了熔炉的热效率,并导致电极热处理不均匀,因此需要对进风口的位置和塔板间的距离进行调整从而优化其内部的流场提高热效率。通过将温度模拟结果与实验数据进行比较,其绝对差异低于2.7%从而验证了模拟的可靠性,为用于制备电弧焊电极的工业炉的设计提供一定的理论依据。The transient heat transfer and turbulent flow in continuous arc welding electrode furnace were simulated by FLUENT software.The simulation accuracy and efficiency will be affected by the huge difference between electrode and furnace body size,electrode movement and various complicated heat transfer modes.To overcome these difficulties,a two-step modeling strategy was adopted.Firstly,the thermal equivalent model is used to simplify the geometry and material composition of the electrode.Secondly,the electrode movement in the furnace is avoided by applying time-dependent boundary conditions to the fixed area.The simulation results show that for existing industrial furnaces,the input air cannot circulate effectively between trays,which reduces the thermal efficiency of the furnace and leads to uneven electrode heat treatment.Therefore,it is necessary to adjust the position of the air inlet and the distance between trays to optimize the internal flow field and improve the thermal efficiency.By comparing the temperature simulation results with the experimental data,the absolute difference is less than 2.7%,which verifies the reliability of the simulation and provides a theoretical basis for the design of industrial furnace for preparing arc welding electrodes.

关 键 词：连续式工业炉 流场 传热 数值模拟 

分 类 号：TQ314.248[化学工程—高聚物工业]