冷藏库预冷降温过程中温度场的数值模拟与试验研究

Numerical simulation on temperature filed of a mini type cold store

【目的】深入了解冷藏库预冷降温过程中的温度特性,提高冷藏库设计与管理水平。【方法】利用计算流体力学(CFD)软件Fluent,采用κ-ε紊流模型和非稳态求解方法,选择合适的边界条件,对冷藏库预冷降温过程进行二维非稳态数值计算,得到了不同时刻的温度场,并通过试验对模拟结果进行验证。【结果】模拟温度与实测温度的变化趋势一致,最大误差为3%,二者具有较好的线性拟合度,其拟合曲线的R2=0.7412,SE=3.1225。【结论】数值模拟能够较好地反应冷藏库预冷过程中的温度变化。

[Objective] The study was to analyze the temperature field in an empty mini type cold store during chilling process,and to improve the design and manage of cold store. [Method] A transient two-dimensional computational fluid Dynamics（CFD） model was developed using software FLUENT. The model calculated turbulence by means of the standard sub-model with appropriate boundary condition. [Result] After temperature field tested,it was found that the maximal error of simulated and measured temperature was 3% ,and change trend was coincident,the correlation determination coefficient （R^2）and standard error （SE） were 0. 741 2 and 3. 122 5. [Conclusion] The model was capable of reflecting temperature change during chilling process with reasonable accuracy.