粮堆内热湿耦合传递数值模拟与试验验证  

Numerical Simulation and Experiment Validation of Coupled Heat and Moisture Transfer in Stored Grains

作　　者：陈桂香[1,2] 岳龙飞[1] 林淼达[1] 张虎 

机构地区：[1]河南工业大学土木建筑学院,郑州450001 [2]河南工大设计研究院,郑州450001

出　　处：《中国粮油学报》2014年第1期77-82,共6页Journal of the Chinese Cereals and Oils Association

基　　金："十二五"国家科技支撑计划(2011BAD03B01);863计划(2012AA 101608)

摘　　要：通风过程中粮堆内热湿耦合传递对储粮安全和粮仓通风有着重要的影响。建立了机械通风冷却过程中粮堆内热湿耦合传递数学模型,在此模型的基础上用C语言编写了用户自定义源项(UDF),实现了谷粒吸附和解析水分时热量交换和水分迁移的CFD数值模拟。以某高大平房仓为例,建立了通风冷却过程中粮仓的三维物理模型;以瞬态条件下外界环境随时间变化的空气温湿度为入口边界条件,通过对比CFD数值模拟结果与实测数据,验证了粮堆内热湿耦合传递数学模型,得出通风冷却过程中粮堆内热湿耦合传递规律。Coupled heat and moisture transfer in stored grains during the ventilation process has very important effect grain and ventilation granary~ ventilation and safety. A mathematical model of coupled heat and moisture trans- fer was presented in this paper to forest the ventilation process of the granary. Based on the model proposed, UDF sources are developed by using C language to simulate heat and moisture processes that occur in the stored grains. It established a three - dimensional physical model of a real large warehouse by taking a large warehouse as an example. The heat and moisture transfer in a real big warehouse during the cooling ventilation, with measured temperature and moisture of air was studied by CFD simulation method and experimental method. The mathematical model proposed was validated by comparing between predicted and measured grain temperature.

关 键 词：高大平房仓 热湿耦合传递 数值模拟 通风冷却 

分 类 号：TS207.7[轻工技术与工程—食品科学]