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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Experimental and numerical investigations of coke descending behavior in a coke dry quenching cooling shaft
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Experimental and numerical investigations of coke descending behavior in a coke dry quenching cooling shaft

机译：干熄焦冷却竖炉中焦炭下降行为的实验和数值研究

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A viscous flow model based on the Navier-Stokes equation is developed to describe coke descending behavior in the 1/7-scaled-down experimental setup of an actual 75 t/h cooling shaft, It is found that the internal friction due to cokes viscosity significantly influences the descending behavior of cokes in the lower part of the shaft, while the external wall friction dominates the sluggish flow of the cokes in the shaft. An asymptotic friction coefficient expression is proposed for granular mixtures flowing along the shaft wall modified from normal wall tress, and the concept of bulk solid viscosity is introduced to describe the internal friction between coke particles. The results simulated by the present model are compared with those by the potential flow and the kinematic model without friction. The viscous flow model is quite good to simulate the bulk coke flow as the physically important frictions are engaged. (c) 2007 Elsevier Ltd. All rights reserved.
机译：建立了基于Navier-Stokes方程的粘性流模型，描述了实际75 t / h冷却轴1/7比例缩小实验装置中焦炭下降的行为，发现焦炭粘度引起的内摩擦焦炭在竖井下部的下降行为有很大的影响，而外壁摩擦力则主要影响竖井中焦炭的缓慢流动。提出了沿正常墙体改型后的竖井壁流动的粒状混合物的渐近摩擦系数表达式，并引入体积固相粘度的概念来描述焦炭颗粒之间的内部摩擦。本模型模拟的结果与势流和运动模型的结果进行了比较，没有摩擦。粘滞流动模型非常好，可以模拟物理上重要的摩擦力，从而模拟大量的焦炭流动。 （c）2007 Elsevier Ltd.保留所有权利。

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