非通风状态新型地下粮仓储粮温度场的CFD数值模拟  

Computational Fluid Dynamics Simulation of Storage Temperature Field in a Non-ventilated Underground Granary

作　　者：王振清[1] 殷鹏[1] 郑家欢[1] 

机构地区：[1]河南工业大学土木建筑学院,河南郑州450001

出　　处：《现代食品科技》2016年第1期170-174,296,共6页Modern Food Science and Technology

基　　金："十二五"国家科技支撑项目(2011BAD03B01);国家863计划(2012AA101608)

摘　　要：地下粮仓储粮温度场是保证储粮品质和绿色生态储粮的重要影响因素。针对地下粮仓试验仓,该文利用Gambit软件建立了地下粮仓的三维立体模型,并对模型进行了网格划分,采用CFD数值模拟方法研究了非通风状态地下粮仓粮食储存过程中粮堆温度场的变化规律。通过编写和导入UDF函数,改进CFD软件中的质量控制方程、动量控制方程和壁面热量传递控制方程,通过迭代计算和基于CFD软件模拟得到了地下粮仓非通风状态条件下温度场的变化规律,研究结果表明,随着地下仓储粮时间的变长,仓内粮堆温度与周围维护结构之间、粮堆之间不停的进行着热质交换,最终温度逐渐趋于当地地下恒温温度值附近,地下仓可以作为一种经济适用的仓型来推广;同时,本文的研究可以为地下粮仓的温度场控制提供参考和依据,为粮堆机械通风手段作为参考。The storage temperature field of an underground granary is an important factor affecting the quality of stored grain and the surrounding environment. In this study, Gambit software was used to build a 3-dimensional model of an underground granary. The model was meshed and variations of the grain heap temperature field under non-ventilated conditions during the storage process were studied using computational fluid dynamics（CFD） numerical simulation method. The mass conservation equation, momentum equations, and wall heat transfer equations in CFD software were optimized by writing and importing the user-defined function（UDF）. Variations in the temperature field at a non-ventilated underground granary were obtained by iterative calculation and CFD software simulation. The results demonstrated a continuous heat and mass transfer between grain heaps and surrounding building structures, as well as between the grain heaps, with an increase in grain storage time in the underground granary. Additionally, the final temperature drew close to the constant local underground temperature. The results show that an underground granary is an economically feasible alternative for grain storage as well as provide a reference for the control of temperature of underground granaries and mechanical ventilation for grain heaps.

关 键 词：地下粮仓 准静态 温度场 CFD 

分 类 号：TS210.8[轻工技术与工程—粮食、油脂及植物蛋白工程]