小麦竖向通风阻力研究  

Vertical ventilation resistance in wheat bulk

作　　者：尹君[1] 石天玉[1] 魏雷[1] 赵会义[1] 张洪清[1] 刘杰[1] 李锦[1] 王芳[1] 

机构地区：[1]国家粮食局科学研究院,北京100037

出　　处：《粮油食品科技》2015年第B03期38-42,共5页Science and Technology of Cereals,Oils and Foods

基　　金：国家粮食公益专项(201313001-06)

摘　　要：为了掌握小麦粮堆在竖向通风时粮堆阻力的变化规律和计算方法,在储藏小麦的180 t试验仓中测试了竖直双向通风的小麦粮堆在不同通风方向和表观风速时的粮堆阻力。结果表明:在进行竖向通风时,小麦粮堆表层存在表层阻力和内部粮层阻力。粮堆总阻力为表层阻力与内部粮层阻力之和,与粮堆高度不呈严格的正比关系。上行压入式通风和下行吸出式通风进行比较,可以看出粮堆的表层阻力和单位粮层阻力存在明显差别,风速越大差别越大,说明粮堆是各向异性的。In order to calculate the resistance of grain heap when ventilated with vertical ventilation sys- tem, an experiment was carried out in an experimental store house with 180t wheat to detect the resist- ance in grain heap during vertical bidirectional ventilation with different direction and superficial gas ve- locity. The results indicated that during vertical ventilation, the resistance existed both on and inside the grain heap. The total resistance of grain heap was the sum of the facial resistance and the interior resist- ances. There was no strictly proportional relationship between the total resistance and the height of the pile. Comparing the upwards vertical ventilation with the downwards vertical ventilation, there was obvi- ous difference between facial resistance and interior resistance, the higher the airflow, the larger the difference, which illuminated that the grain heap is anisotropic.

关 键 词：竖向通风 粮堆阻力 表层阻力 双向通风 

分 类 号：S379.5[农业科学—农产品加工]