不同中心集风管形式对浅圆仓降温通风效果的模拟研究

在CFD数值模拟技术的基础上,对浅圆仓不同中心集风管形式下的径向通风降温数值模拟结果分析,并进行对比以评判优劣。研究的粮食种类为大豆,数值模拟了四种变径形式的中心集风管顶部,或开孔或不流通,共八种情况的通风条件下,粮堆内部温度分布和气流组织情况,将八种情况下的数值模拟结果对比,分析其通风均匀性和通风降温速率。研究发现,集风管高度与粮面平齐且上粗下细时有较为明显的优越性,通风均匀性较好。研究结果对浅圆仓仓储大豆通风降温方式的选择提供了理论依据。

Simulation Study on Cooling and Ventilation Effect of Different Central Air Collection Pipe Forms on Shallow Circular Warehouse

On the basis of CFD numerical simulation technology, the numerical simulation results of radial ventilation and cooling under different central air collection pipe forms of shallow circular silo were analyzed, and they were compared to judge the advantages and disadvantages. The grain type studied in this paper was soybean. The temperature distribution and air distribution in the grain pile under the ventilation of the top or opening or non-circulation of four variable diameter central air collection pipes were numerically simulated. The numerical simulation results of the eight cases were compared to analyze their ventilation uniformity and ventilation cooling rate. It is found that the air collecting duct has obvious advantages when its height was flush with the grain surface, thick at the top and fine at the bottom, which is mainly reflected in its ventilation uniformity. The research results provide theoretical guidance and basis for the selection of ventilation and cooling methods for soybean storage in shallow circular warehouse.