The Anton Paar Powder Cell was used to measure the torque necessary to rotate an impeller in beds of glass beads, sand and alumina powders aerated between no aeration to the minimum for fluidization. Measured torque values depend on the material tested, on the air flow rate applied, on the impeller depth and on the height of the impeller blade. The effect of the impeller depth is linear for low impeller depth and is less than linear at high depth values. A model was developed for the interpretation of the experimental results based on the idea that the material is shearing on the surface described by the impeller rotation. The model allows to estimate an effectiveness of the impeller in the torque determination and also to predict the torque for the impeller at the at deepest positions at which the wall effects have to be considered. © 2017 American Institute of Chemical Engineers AIChE J, 2017

中文翻译：

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在使用粉末流变仪表征低固结力和抗扭矩性能下的粉末流动性

Anton Paar粉末池用于测量在不充气的情况下旋转玻璃珠，沙子和氧化铝粉末床中的叶轮至流态化的最小值所需的扭矩。测得的扭矩值取决于所测试的材料，所施加的空气流量，叶轮深度和叶轮叶片高度。对于低叶轮深度，叶轮深度的影响是线性的，而在高深度值时，叶轮深度的影响小于线性。基于材料在叶轮旋转所描述的表面上被剪切的想法，开发了一个用于解释实验结果的模型。该模型允许估计叶轮在扭矩确定中的有效性，还可以预测在必须考虑壁效应的最深位置处的叶轮扭矩。AIChE的Ĵ，2017年