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首页> 外文期刊>Revista Brasileira de Engenharia Agricola e Ambiental >Airflow distribution in aerated silos: finite element analysis
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Airflow distribution in aerated silos: finite element analysis

机译:加气筒仓内气流分布:有限元分析

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In this work the finite element technique was used to obtain the air distribution in a mass of corn kernels submitted to an aeration process. The product (13% w.b.) was stored in metallic bin provided with a circular duct aeration system. The mass of grains was considered as being composed of regions (distributed resistances) that offer different resistances to the airflow in the horizontal and vertical directions. The model for air distribution in the bin was validated through experiments under similar conditions to the simulated ones with 0.0157 m3 s-1 m-2 airflow. The simulated air distribution indicated the existence of zones of low air velocities in the mass of grains located at the base of the bin (close to the center and to the wall of the bin). The simulated and experimental air velocities on the surface of the mass of grains showed a uniform tendency. The use of the finite element technique for the prediction of the airflow distribution in bins with aeration system was satisfactory and it involved a mean relative error of 6.9%..
机译:在这项工作中,使用有限元技术获得了经过曝气处理的大量玉米粒中的空气分布。产物(w.b.的13%)储存在装有圆形管道通气系统的金属箱中。谷物的质量被认为是由在水平和垂直方向上对气流提供不同阻力的区域(分布阻力)组成的。通过与0.0157 m3 s-1 m-2气流模拟条件相似的条件下的实验,验证了箱中空气分布的模型。模拟的空气分布表明位于垃圾箱底部(靠近垃圾箱的中心和壁)的谷物中存在低速区域。在谷物表面上的模拟和实验空气速度显示出均匀的趋势。使用有限元技术预测带有曝气系统的垃圾箱中的气流分布是令人满意的,其平均相对误差为6.9%。

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