不同果径苹果差压预冷性能模拟与分析  

Simulation and analysis of forced air precooling performance ofapples with different fruit diameters

作　　者：田津津[1,2] 谷旭东 张哲 朱志强[3] 集贤[3] TIAN Jinjin;GU Xudong;ZHANG Zhe;ZHU Zhiqiang;JI Xian(Key Laboratory of Refrigeration Technology,Tianjin University of Commerce,Tianjin 300314,China;School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300314,China;Tianjin Academy of Agricultural Sciences National Engineering Research Center for Preservation of Agricultural Products〔Tianjin〕,Key Laboratory of Storage and Preservation of Agricultural Products of the Ministry of Agriculture and Rural Affairs,Tianjin 300384,China)

机构地区：[1]天津商业大学制冷技术重点实验室,天津300314 [2]天津商业大学机械工程学院,天津300314 [3]天津市农科院国家农产品保鲜工程技术研究中心〔天津〕农业农村部农产品贮藏保鲜重点实验室,天津300384

出　　处：《食品与机械》2024年第2期117-124,176,共9页Food and Machinery

基　　金：国家自然科学基金(编号:12172254,11772225)。

摘　　要：目的:分析相同包装箱下不同果径苹果对差压预冷的影响。方法:基于球形类比模型和传热理论,使用CFD非稳态SST k-ω湍流模型,对不同送风风速、温度、包装箱开孔大小、果径苹果的差压预冷情况进行数值模拟,选取3种不同工况条件进行准确性验证。结果:送风温度越低、风速越快、苹果果径越小,冷却速度越快;送风温度越高、风速越快、开孔越大预冷均匀性越好。综合正交试验结果对比来看,果径大小对差压预冷的影响显著。结论:苹果果径对预冷的冷却速率和均匀度影响程度最大,需要针对不同果径苹果采取合理的包装方式和码放方式。Objective:To analyze the effect of apples of different fruit diameters on differential pressure precooling under the same box.Methods:Based on the spherical analogy model and heat transfer theory,the CFD unsteady SST k-ωturbulence model was used to numerically simulate the differential pressure precooling of apples with different air supply air speed,temperature,box opening size and fruit diameter,and three different working conditions were selected for accuracy.The simulation scheme of mixed orthogonal test was used to discuss the effects of different factors and different fruit diameters on the cooling rate and pre-cooling uniformity.Results:The lower of the air supply temperature was,the faster the wind speed was,the smaller of the apple diameter was,and the faster of the cooling rate it was.The higher of the supply air temperature was,the faster the wind speed was,the larger of the opening was,and the better of the uniformity of precooling it was.Based on the comparison of orthogonal test results,the effect of fruit diameter on differential pressure precooling was significant.Conclusion:Apple fruit size has the greatest influence on the cooling rate and uniformity of pre-cooling,and reasonable packaging and stacking methods need to be adopted for apples with different fruit diameters.

关 键 词：差压预冷 苹果 果径 CFD仿真 包装方式 码放方式 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]