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为了研究气垫式退火炉内工件漂浮的情况,建立了三维湍流数学模型,运用计算流体动力学(CFD)的方法得到炉内的气体流场与压力场。通过流-固耦合的方法分析在不同的边界条件下工件表面产生的压力场对其在炉内稳定漂浮的影响。应用该模型通过控制变量的方式对其他不同规格的工件达到漂浮加热的所需风速及漂浮高度进行预测。结果表明,宽度为1050 mm的铜带在上、下出风口的速度分别为4 m/s和7 m/s时,距离上喷口60~70 mm处实现无接触加热及传送。
In order to study the floating condition of the workpiece in an air-cushion annealing furnace, a three-dimensional mathematical model of turbulence was established and the gas flow and pressure fields in the furnace were obtained by computational fluid dynamics (CFD). The influence of the pressure field generated by the workpiece surface on the steady floating in the furnace under different boundary conditions is analyzed by means of fluid-solid coupling. The model is used to predict the required wind speed and floating height of other workpieces of different specifications by controlling the variables. The results show that when the width of 1050 mm copper strip is up to 4 m / s and 7 m / s respectively, the contactless heating and conveying are achieved at 60-70 mm from the upper nozzle.