基于场协同理论的冷藏展示柜内流体对流换热分析  

Fluid Convection Heat Transfer in Refrigerated Display Cabinet Based on Field Synergy Theory

作　　者：王亚臣 刘竹丽[1] 梁帅 WANG Ya-chen;LIU Zhu-li;LIANG Shuai(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450000,China;Guangdong Shunde Innovative Design Institute,Foshan 528000,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450000 [2]广东顺德创新设计研究院,广州佛山528000

出　　处：《包装工程》2022年第1期245-252,共8页Packaging Engineering

基　　金：河南省高层次人才特殊支持计划“中原千人计划”“中原领军人才”(ZYQR201912087)。

摘　　要：目的研究冷藏柜内对流换热机理,增强冷藏柜内流体对流换热效果,提高冷气流冷却效率。方法从冷藏柜出风口角度出发,建立数学模型,通过Ansys流体分析软件对冷藏柜内流场进行模拟仿真,应用场协同理论研究冷藏柜内流体流动及传热机理。结果出风口角度在30°附近时冷藏柜内换热效率较高且温度分布较为均匀,此时商品壁面的存在改变了冷气流流动方向。在壁面增加半圆突起后,气流沿圆弧切线方向流动,改善了速度与温度梯度之间的协同程度,从速度场、温度场及其相互作用的角度增强了冷藏柜内的对流换热效果,整体换热效率提高了38.65%。结论冷藏柜内流体流动及传热强化的根本在于流体的扰动,而出风口角度的改变和壁面凸起的存在加强了商品对流体的扰动,两者共同作用改变了冷藏柜内场的分布,进而提高了冷藏柜整体的冷藏效率,该研究可为冷藏柜的工厂化生产提供参考价值。The work aims to study the convection heat transfer mechanism in the refrigerator,strengthen the convection heat transfer effect of the fluid in the refrigerator and improve the circulation efficiency of cold air.A mathematical model was established from the point of view of air outlet of the refrigerator.The internal flow field of the refrigerator was simulated by Ansys fluid analysis software,and the flow field and heat transfer mechanism in the refrigerator were studied by field synergy theory.It was found that when the angle of the air outlet was around 30°,the heat transfer efficiency in the refrigerator was higher and the temperature distribution was more uniform.At this time,the existence of the goods walls greatly changed the flow direction of cold air.After the semi-circle protrusions were added on the wall surface,the air flowed along the tangent direction of the circular arc,improved the degree of synergy between speed and temperature gradient,enhanced the convection heat exchange in the refrigerator from the angle of speed field,temperature field and their interaction.The overall heat exchange efficiency was increased by 38.65%.It was concluded that the cause of fluid flow and heat transfer in the refrigerator was the fluid disturbance.The change of air outlet angle and the presence of protrusions enhanced the disturbance of the goods to fluid.The combined action of the two changed the distribution of the inner field of the refrigerator,and improved the overall refrigeration efficiency of the refrigerator.The research can provide reference value for the factory production of refrigerated cabinet.

关 键 词：流场分析 场协同理论 对流换热 结构优化 流体扰动 

分 类 号：TK124[动力工程及工程热物理—工程热物理]