With the objective to improve the cross-section velocity uniformity of uniform air duct in enameled oven, the flow field and velocity distribution of uniform air duct outlet section in hot air cir-culation enameled oven of a enamel-covered machine RHW3600 was studied by numerical simulation based on fluid dynamics computational software Fluent.Results show that the installation angle of ori-fice plate plays a great influence on average-current when the orifice plate is installed in straight;and installation location is more important when installed in curved way.The degree coefficient K of ex-treme value deviating from average velocity at the measuring points of the optimal orifice outlet cross-section is 6.27%.%以提高漆包机烘炉均风道出口断面速度均匀性为目标，以Fluent软件为计算平台，对国产RHW3600型热风循环漆包机烘炉均风道内的流场、出口速度分布进行数值模拟研究。结果表明，在直道中安装孔板，孔板安装角度对均流效果影响较大；弯道内安装孔板，安装位置对改善出口气流速度横向均匀性效果更好。最优孔板出口断面速度测点的极值偏离平均值的程度系数K＝6.27％。
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