中文摘要：

粮食自然储藏过程中，由于外界环境温度的季节性变化，会引起粮堆内部热量传递和水分迁移，使粮堆内局部的温度和水分升高，而就仓机械通风是解决这个问题的有效方式。本文基于多孔介质传热传质理论，用数值模拟与试验相结合的方法对小麦粮仓自然储藏及机械通风过程中热湿耦合规律进行研究，并与试验数据对比，结果表明：粮堆内部微气流是造成粮堆水分迁移的重要因素；粮堆粮食颗粒与空气问存在吸湿与解吸湿作用；机械通风是保证安全储粮的有效手段。

英文摘要：

In the process of grain storage, the seasonal variations in the temperature of the environment can cause the heat transfer and moisture migration in grain bulk, increasing its local temperature and moisture. While the mechanical ventilation is an effective way to solve this problem. Based on the theory of heat and mass transfer in porous media, the law of coupled heat and moisture transfer in the natural storage and mechani- cal ventilation of wheat grain is studied by combining numerical simulation and experimental method. And then it is compared with experimental data, the results show that： the micro-airflow in a grain bulk is the main factor for causing the moisture migration of grain bulk; there is moisture adsorption and desorption effect between air and the grain particle in the grain bulk; the mechanical ventilation is an effective way to ensure the safety of grain storage.