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首页> 外文期刊>International journal of chemical engineering >Study of the Pressure Drop and Flow Field inStandard Gas Cyclone Models Using the Granular Model
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Study of the Pressure Drop and Flow Field inStandard Gas Cyclone Models Using the Granular Model

机译：使用颗粒模型研究标准气旋模型中的压降和流场

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A particle-laden flow inside solid gas cyclones has been studied using computational fluid dynamics (CFD). The effects of high temperatures and different particle loadings have been investigated. The Reynolds stress (RSM) model-predicted results, in the case of pure gas, are within engineering accuracy even at high temperatures. Using the granular mixture model for the cases of particle-laden flow, discrepancies occurred at relatively high loadings (up to 0.5 kg/m~3). Since the pressure drop is strongly related to the friction inside the cyclone body, the concept of entropy generation has been employed to detect regions of high frictional effects. Friction has been observed to be important at the vortex finder wall, the bottom of the conical-part wall, and the interface separating the outer and the core streams. The discrepancies between the present numerical simulation and the experimental results taken from the existing literature, which are caused by the mixture and turbulence models simpkifying assumptions, are discussed in this paper.
机译：使用计算流体动力学（CFD）研究了固体气体旋风分离器内部的载有颗粒的流动。已经研究了高温和不同颗粒负载的影响。在纯气体的情况下，即使在高温下，雷诺应力（RSM）模型预测的结果也处于工程精度范围内。对于满载颗粒的情况，使用颗粒混合物模型，在相对较高的载荷下（最大0.5 kg / m〜3）会出现差异。由于压降与旋风分离器内部的摩擦力密切相关，因此已采用熵产生的概念来检测具有高摩擦效果的区域。已经观察到在涡流探测器壁，圆锥形部分壁的底部以及分隔外部气流和核心气流的界面处，摩擦非常重要。本文讨论了由混合和湍流模型简化假设所引起的当前数值模拟与现有文献得出的实验结果之间的差异。

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