马铃薯气调集装箱内换热与气体组分浓度变化的数值模拟研究OA

This study aimed to deeply explore the key factors of potato storage environment in modified atmosphere containers through numerical simulation methods,providing a theoretical basis for the optimization and application of modified atmosphere container technology in Inner Mongolia.Using the computational fluid dynamics(CFD)method,combined with porous media theory and user-defined function(UDF)programming,a three-dimensional transient numerical model considering the respiration and metabolism ef-fects of potato was established.On this basis,the effects of different air supply speeds(2.000 m/s,5.000 m/s,and 6.000 m/s)on the airflow velocity field,oxygen and carbon dioxide concentration distribution,and temperature evolution process were studied.The simulation results showed that the air supply speed had a significant impact on the flow field structure and gas concentration dis-tribution,and the air supply speed of 5.000 m/s could achieve more uniformity between gas distribution and temperature field on the basis of balancing energy consumption and gas displacement efficiency.In terms of airflow distribution,the high-velocity jet and forced convection near the inlet caused the gas concentration to change drastically,while the middle and rear regions showed a gradu-al slowdown of concentration gradient and a stable trend of temperature.This study clarified the main transport mechanisms in the gas transport process,revealing its influence on the uniformity of the storage environment,and providing a scientific basis for the ap-plication of potato modified atmosphere container storage in Inner Mongolia.