中文摘要：

机械通风是实现安全储粮、保证粮食品质的主要措施。以小麦为研究对象，采用计算流体动力学（computational fluid dynamics，CFD）的方法对大型平房仓小麦的横向通风、压入和吸出式竖向通风阻力进行了数值模拟，通过对不同通风方式下粮堆的阻力的分析发现，粮层阻力与风量成正比，风量越大，粮层阻力越大；通风方式不同，单位粮层阻力也不相同，小麦下行通风的单位粮层阻力最大，上行通风次之，横向通风最小。通过对小麦粮种各向异性阻力的分析，为以后不同粮种机械通风系统的分析奠定基础。

英文摘要：

Mechanical ventilation was the main measure to keep the grain storage security and guarantee quality of grain. Based on Computational Fluid Dynamics（CFD） method, numerical simulation analysis of horizontal ventilation and vertical ventilation resistance in press - in and extraction method of wheat in large - scale horizontal warehouse was conducted ; through the resistance analysis of grain pile under different ventilation modes, some conclusion was accepted that grain resistance was proportional to air flow rate, the larger air flow rate is, the greater resistance was ; the unit grain layer resistance was related to ventilation in different ways, downward ventilation was largest, the ascensional ventilation was thesecond and horizontal ventilation was smallest. Through the analysis of the anisotropic resistance of wheat, the foundation was established for different grain analysis of mechanical ventilation system in the future.