基于Fluent与EDEM的谷物干燥机角状管结构优化  

Optimization of the structure of the grain dryer’s angular tube based on Fluent and EDEM

作　　者：姚燕生 芮旭东 阚宏林[2] 张为法 YAO Yansheng;RUI Xudong;KAN Honglin;ZHANG Weifa(College of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,China;College of Artificial Intelligence,Anhui Polytechnic University,Wuhu 241000,China;Anhui Zhengyang Machinery Technology Co.,Ltd.,Lu’an 237000,China)

机构地区：[1]安徽建筑大学机械与电气工程学院,安徽合肥230601 [2]安徽工程大学人工智能学院,安徽芜湖241000 [3]安徽正阳机械科技有限公司,安徽六安237000

出　　处：《广西科技大学学报》2025年第2期1-7,25,共8页Journal of Guangxi University of Science and Technology

基　　金：安徽省农业补短板揭榜挂帅项目(KZ22023128)资助。

摘　　要：针对现有混流式谷物干燥机的干燥不均匀问题,基于计算流体动力学(computational fluid dynamics,CFD)模型内嵌离散元的数值模拟方法,分析谷物干燥机角状管不同截面尺寸方案下干燥介质的流场分布与谷物颗粒流动特性;在角状管最优截面尺寸的基础上,优化角状管内部结构,增设导流板;通过多目标响应面法确定导流板最优参数。研究结果表明:在角状管宽度和数量不变的条件下,当挡风板高度为56 mm时,计算结果最优,即风速平均值为1.68 m/s,不均匀系数为69.18%;压力平均值为969.39 Pa,不均匀系数为3.10%;热力学温度平均值为321.29 K,不均匀系数为3.16%;在角状管内部进口端增设长405 mm、高45 mm导流板后,其干燥介质风速不均匀系数为58.24%,热力学温度不均匀系数为2.10%,流场分布更加均匀,可为后期干燥机结构优化提供参考。In response to the uneven drying problem of existing mixed flow grain dryers,a numerical simulation method based on computational fluid dynamics(CFD)model with embedded discrete element was employed to analyze the flow field distribution of drying medium and grain particle flow characteristics under different cross-sectional sizes of corner tubes in grain dryers.On the basis of the optimal cross-sectional size of the angle tube,the internal structure of the angle tube was optimized by adding a guide plate;and the optimal parameters of the guide plate were determined through the multi-objective response surface method.The research results indicate that under the condition of constant width and number of corner tubes,the optimal calculation results are achieved when the height of the wind deflector is 56 mm.Specifically,the average wind speed is 1.68 m/s with the non-uniformity coefficient of 69.18%,the average pressure is 969.39 Pa with the non-uniformity coefficient of 3.10%,and the average temperature is 321.29 K with the non-uniformity coefficient of 3.16%.After a 405-mm-long-and-45-mm-high deflector was added at the inner inlet end of the horn tube,the uneven velocity coefficient of the drying medium is reduced to 58.24%,and the temperature unevenness coefficient is reduced to 2.10%,resulting in a more uniform flow field distribution.These findings can provide a reference for optimizing the structural design of dryers in future studies.

关 键 词：计算流体动力学(CFD) 离散元 响应面法 

分 类 号：S226.6[农业科学—农业机械化工程]