A Numerical Study of the Impact of Radial Baffles in Solid Bowl Centrifuges Using Computational Fluid Dynamics
A Numerical Study of the Impact of Radial Baffles in Solid Bowl Centrifuges Using Computational Fluid Dynamics
复制标题
使用计算流体动力学对实心转鼓离心机中径向挡板的影响进行数值研究
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
H. Nirschl
中科院分区：
文献类型：
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作者：
X. R. Fernández;H. Nirschl
离心分离设备，例如固体转鼓离心机，用于从工业流体中有效地分离细颗粒。了解转鼓离心机内部的液流和沉降行为是确定离心机几何形状和工艺参数以获得最佳性能的必要条件。对于给定的工业离心机几何形状，建立网格以使用计算流体动力学（CFD）软件数值计算水、空气和颗粒的多相流。研究了内径向挡板对多相流的影响。结果表明，挡板有助于流体的加速，但会扰动轴向边界层，使其不规则，并产生二次环流，阻碍小颗粒的沉降。
Centrifugal separation equipment, such as solid bowl centrifuges, is used to carry out an effective separation of fine particles from industrial fluids. Knowledge of the streams and sedimentation behavior inside solid bowl centrifuges is necessary to determine the geometry and the process parameters that lead to an optimal performance. Regarding a given industrial centrifuge geometry, a grid was built to calculate numerically the multiphase flow of water, air, and particles with a computational fluid dynamics (CFD) software. The effect of internal radial baffles on the multiphase flow was investigated. The results show that the baffles are helpful for the acceleration of the fluid, but they disturb the axial boundary layer, making it irregular, and originate a secondary circulating flow which hinders the sedimentation of small particles.