考虑流固耦合的烘箱热风流场模拟与结构优化

Heat Flow Field Simulation and Structure Optimization of Oven Based on Fluid-Solid Coupling

热风烘箱风嘴出风速度的均匀性是影响产品质量和干燥效果的关键因素,本研究采用数值模拟的方法对烘箱体内热风流动规律进行了研究,计算了各切片的平均风速值及方差值,引用风速偏差比E和风速不均匀系数M作为评价指标,并考虑了流固耦合因素对风速均匀性的影响,对比了耦合前后风速的均匀性,在烘箱长度方向上加入了导流板并优化烘箱的结构。研究结果表明,原始烘箱模型的风嘴出风风速存在严重的不均匀性,风速偏差比为27.13%,风速不均匀系数为33.15%;改进后的烘箱结构的风速偏差比降为9.32%,风速不均匀系数降为5.18%,显著改善了各风嘴的出风均匀性,提高了干燥效果影响,本研究为优化烘箱的结构提供一定的参考依据。

The uniformity of the wind speed of the wind hot air drying oven is a key factor affecting product quality and the effect of drying.In this study,the method of numerical simulation was used to study the oven body hot air flow pattern,the average speed of each section and variance values were calculated,velocity deviation ratio E and velocity non-uniform coefficient M as evaluation index were reference,and the fluid-structure interaction factors effect on the velocity uniformity was considered.The uniformity of velocity before and after coupling was compared and a guide plate was added along the length direction of the oven and the structure of the oven was optimized.The results showed that the air velocity of the original oven model had serious non-uniformity,the velocity deviation ratio was 27.13%,and the velocity non-uniformity coefficient was 33.15%.The velocity deviation ratio of the improved oven structure decreased to 9.32%,and the velocity non-uniform coefficient decreased to 5.18%,which significantly improved the air uniformity of each nozzle and enhanced the effect of drying effect.This study provides a certain reference for the optimization of the oven structure.