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Influence of inlet air distributor geometry on the fluid dynamics of conical spouted beds: A CFD study

机译:入口空气分配器几何对锥形喷射床流体动力学的影响:CFD研究

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摘要

The spouted bed presents limitations in terms of scale-up. Furthermore, its stability depends on its geometry as well as the properties of the fluid and solid phases. CFD provides an important tool to improve understanding of these aspects, enabling a wide range of information to be obtained rapidly and at low cost. In this work, CFD simulation was used to evaluate the effects of different inlet air distributors (Venturi and straight tube) and the effects of static bed height on the fluid and solid dynamics of a conical spouted bed. Simulations were performed using the two-dimensional Euler-Euler approach. In order to evaluate the fluid dynamics model, static pressure data obtained by simulation were compared with experimental data obtained with the Venturi distributor. The fluid and solid dynamics of the conical spouted bed were obtained by CFD simulation. The results showed that the pressure drop was lower for the straight tube air distributor, while the Venturi air distributor provided higher stability and a more homogenous air distribution at the bed entrance.
机译:喷出的床在扩大方面提出了局限性。此外,其稳定性取决于其几何形状以及流体和固相的性质。 CFD提供了一种重要的工具来提高对这些方面的理解,可以快速获得广泛的信息,并以低成本获得。在这项工作中,CFD仿真用于评估不同入口空气分配器(Venturi和直管)的效果以及静态床高度对锥形喷射床的流体和固体动力学的影响。使用二维Euler-euler方法进行模拟。为了评估流体动力学模型,将通过模拟获得的静态压力数据与使用Venturi分配器获得的实验数据进行比较。通过CFD模拟获得锥形喷射床的流体和固体动力学。结果表明,直管空气分配器的压降较低,而文丘里空气分配器在床入口处提供更高的稳定性和更均匀的空气分布。

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