果蔬蒸汽烫漂与热风真空干燥设备的结构优化  

Structure Optimization of Steam Blanching and Hot Air Vacuum Drying Equipment for Fruits and Vegetables

作　　者：王栋[1] 聂皓 袁越锦[1] 谢永康 赵哲[1] 卢禹铭 WANG Dong;NIE Hao;YUAN Yuejin;XIE Yongkang;ZHAO Zhe;LU Yuming(College of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China;Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)

机构地区：[1]陕西科技大学机电工程学院,西安710021 [2]河南省农业科学院,郑州450002

出　　处：《真空科学与技术学报》2023年第5期450-459,共10页Chinese Journal of Vacuum Science and Technology

基　　金：陕西省教育厅青年创新团队项目(21JP016);国家自然科学基金项目(51876109);陕西省国际科技合作计划重点项目(2020KWZ-015)。

摘　　要：为解决蒸汽烫漂与热风真空干燥设备中风速流场不均匀的问题,提高干燥设备热风干燥过程的均匀性,利用计算流体动力学对热风干燥过程的流场进行模拟分析,提出3种改进方案,并且每种方案选择4组模型。通过对比分析每组模型的速度均匀性和流场分布情况,以速度不均匀性为指标,得到在每个喷嘴出口处后端安装宽度为11 mm的喷嘴挡板为最优模型,其速度不均匀系数为10.4%,相比于改进前的模型速度不均匀性降低23.61%,极大的改善热风干燥的均匀性。最后对改进的模型进行试验验证,模拟值与试验测量值的相对误差均在10%以内,模拟值与实测值相差较小,说明所建模型较为准确。In order to solve the problems of non-uniform wind speed and flow field in steam blanching and hot air vacuum drying equipment,improve the uniformity of the hot air drying process of drying equipment,computational fluid dynamics was used to simulate and analyze the flow field of hot air drying process,and three improvement schemes were proposed,and four groups of models were selected for each scheme.By comparing and analyzing the velocity uniformity and flow field distribution of each group of models,the velocity non-uniformity is taken as the index;it is obtained that the optimal model is to install a nozzle baffle with a width of 11mm at the rear end of each nozzle outlet,and its velocity non-uniformity coefficient is 10.4%,which is 23.61%lower than the model before improvement,greatly improving the uniformity of hot air drying.Finally,the improved model was tested and verified.The relative error between the simulated value and the measured value is within 10%,and the difference between the simulated value and the measured value is small,indicating that the model is accurate.

关 键 词：果蔬 热风真空干燥 CFD 结构优化 

分 类 号：TK173[动力工程及工程热物理—热能工程]