粮食物性和粮层阻力实验研究  

Experimental Study of Grain Physics and Grain Bulk Resistance

作　　者：杨英强[1] 俞忠[1] 

机构地区：[1]上海交通大学工程力学实验中心,上海200240

出　　处：《实验室研究与探索》2008年第8期32-34,共3页Research and Exploration In Laboratory

摘　　要：对三种有代表性的粮食(大米、稻谷和玉米)在不同堆载高度下的物理性质和阻力特性作了比较详尽的实验研究。结果表明:粮食的孔隙率、粮层阻力与粮食堆载高度之间存在明显的非线性关系。在粮食机械通风数值模拟和工程应用中必须加以重视。This article studied particularly grain physics and grain bulk resistance of three representative grains（ rice, paddy and corn）. The results indicate between the small opening ratio, the grain bulk resistance and the height there exists evidently non-linear relation. This is very impotant to CFD and engineering application of mechanical ventilation.

关 键 词：孔隙率 粮层阻力 表现风速 沿程压力降 

分 类 号：TV321[水利工程—水工结构工程]