多通道烘缸的传热模拟及优化

目前造纸机烘缸大多采用虹吸管式冷凝水排出装置，由于受烘缸积水的影响，传统烘缸干燥效率下降，纸页受热 不均匀。基于此，对传统烘缸进行改造，设计出多通道烘缸的结构，文章应用FLUNET软件对不同高宽比的小通道进行 了传热模拟，得到优化后的小通道尺寸值，结果表明小通道尺寸高、宽均为10 mni时，平均冷凝传热系数值最大，传热效 率最高。对多通道烘缸进行尺寸优化有利于提高烘缸传热效率，节约能源

Heat Transfer Simulation and Optimization for Multiport Cylinder

At present. most of the paper machine dryer use the siphon type of condensed water discharge device. Due to the impact of remaining water in dryer, the drying efficiency of the traditional dryer is low, and the paper-pages is uniformly heated. Based on these disadvantages of the traditional dryer. the traditional structure was modified. and the structure of multiport cylinder was designed. Fluent software was applied to simulate heat transfer about small channel with different depth-width ratio. The optimized dimensions of the small channel were gotten. While the height and width was 10 mm. the average condensation heat transfer coefficient was biggest, and the heat transfer efficiency was highest. Size optimization for multiport cylinder is helpful to improve the heat transfer efficiency and energy saving.