基于Fluent的不同形状烘箱风管流场仿真分析及应用

Simulation Analysis and Application of the Flow Field in the Air Duct with Different Shapes on the Drying Oven Based on Fluent

风管是烘箱中最为关键的部分,其质量直接影响织物拉幅定形的效果。针对目前设计风管结构时,存在着主要凭借设计师自身经验,而缺少计算分析的缺点,提出了通过Fluent软件对多种形状的风管进行仿真分析,并通过实验测量验证了模型的可靠性,最终确定了多种形状风管的适用场合。结果表明方孔式风管适用于绝大部分机织物、针织物;圆孔式风管较适用于对流速大小要求相对小些的织物,如化纤织物等;狭缝式风管由于在织物表面提供了非常好的气流分布,使得织物表面水分的干燥更快、更均匀,因而适用于长绒和毛圈织物。

The air duct is the most critical part of drying even,and it has a significant impact on the effect of the fabric drying and heat setting.Since when designed the structure of the air duct,existed relying on designer own experience lack of calculation and analysis.The paper analyzed flow field in air ducts with different shapes through FLUENT software,verified the feasibility of the models by actual measurement,finally made the applicable occasions of these ducts clearly.The result shows that square hole-type duct is suitable for vast majority of woven and knitted fabrics; the cireular hole-type duct is fit for the fabric which has relatively smaller velocity magnitude requirement,such as chemical fiber fabrics; since the slot-type duct provides a very good distribution of air flow on the surface of fabric,make the fabric surface moisture drying faster,and thus is suitable for deep pile and loop pile fabrics.