基于Fluent的顶风式热泵干燥箱气流场分析及优化  

Analysis and Optimization of the Airflow Field in a Head-air Heat Pump Dryer Based on Fluent

作　　者：陈子民 莫江婷 陈广生 郭小璇 朱贤文 CHEN Zimin;MO Jiangting;CHEN Guangsheng;GUO Xiaoxuan;ZHU Xianwen(Nanning Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Nanning 530029,China;Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Nanning 530023,China;Southern Power Grid Digital Power Grid Technology(Guangdong)Co.,Ltd.,Guangzhou 510663,China)

机构地区：[1]广西电网有限责任公司南宁供电局,南宁530029 [2]广西电网有限责任公司电力科学研究院,南宁530023 [3]南方电网数字电网科技(广东)有限公司,广州510663

出　　处：《中国农业科技导报》2024年第10期135-144,共10页Journal of Agricultural Science and Technology

基　　金：广西重点研发计划项目(2021AB38037);广西电网公司科技项目(GXKJXM20200427,GXKJXM20200428)。

摘　　要：热泵干燥箱作为当前主要的果蔬类产品的节能干燥设备,其内部流场的均匀性对干燥效率与品质至关重要。针对顶风式热泵干燥箱内部流场层间不均匀性问题,采用Fluent动网格数值仿真方法对其内部流场进行优化,提升了流场层间均匀性及干燥效率。基于顶风式干燥箱的结构特点,创新性设计了可控移动导风板机构,并针对该机构匀速运动、分段匀速运动、匀速+停滞复合运动3种方案进行了对比,结果表明,匀速+停滞复合运动方案的流场层间均匀性最佳,经优化后的层间风量分布不均匀系数低至7.02%,并通过青梅烘干实验验证了该优化方案的有效性,优化后的各层青梅含水率标准差为0.01。该系统可为顶风式热泵干燥箱流场设计和结构优化提供借鉴。As the main energy-saving drying equipment for fruit and vegetable products at present,the uniformity of the internal flow field is very important to the efficiency and quality of drying.In this paper,the internal flow field of top-wind heat pump drying oven was optimized using the research method of Fluent dynamic grid numerical simulation optimization and experimental verification,which improved the inter-layer uniformity and drying efficiency of the flow field.Based on the structural characteristics of the headwind drying box,a controllable moving air deflector mechanism was innovatively designed,and 3 schemes including uniform motion,segmented uniform motion and uniform+stagnation compound motion were compared.The simulation results showed that the uniform+stagnation compound motion scheme had the best interlayer uniformity of flow field.After optimization,the uneven coefficient of air volume distribution between layers was as low as 7.02%,and the effectiveness of the optimization scheme was verified by the experiment of green plum drying.The standard deviation of water content of each layer after optimization was 0.01.The system provided reference for the flow field design and structure optimization of the top-wind heat pump drying oven.

关 键 词：顶风式干燥箱 FLUENT 动网格 结构优化 流场均匀性 

分 类 号：S226.6[农业科学—农业机械化工程]