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过程工程学报 ›› 2016, Vol. 16 ›› Issue (1): 10-17.DOI: 10.12034/j.issn.1009-606X.215224

• 流动与传递 • 上一篇    下一篇

液固分选流化床三相流场模拟中各粘性流动模型的适用性

韦鲁滨 孙铭阳 朱学帅 李大虎 李阳1   

  1. 中国矿业大学（北京）化学与环境工程学院 中国矿业大学（北京）化学与环境工程学院 中国矿业大学（北京）化学与环境工程学院 中国矿业大学（北京）化学与环境工程学院 中国矿业大学（北京）化学与环境工程学院
  • 收稿日期:2015-05-26 修回日期:2015-10-20 出版日期:2016-02-20 发布日期:2016-12-22
  • 通讯作者: 韦鲁滨

Research on Performances of Different Viscous Models in Simulation of Three-phase Flow Fields in a Liquid-Solid Fluidized Bed Separator

WEI Lu-bin SUN Ming-yang ZHU Xue-shuai LI Da-hu LI Yang   

  1. School of Chemistry & Engineering, China university of Mining & Technology (Beijing) School of Chemistry & Engineering, China university of Mining & Technology (Beijing) School of Chemistry & Engineering, China university of Mining & Technology (Beijing) School of Chemistry & Engineering, China university of Mining & Technology (Beijing) School of Chemistry & Engineering, China university of Mining & Technology (Beijing)
  • Received:2015-05-26 Revised:2015-10-20 Online:2016-02-20 Published:2016-12-22
  • Contact: WEI Lu-bin

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摘要： 为确定适于液固分选流化床(LSFBS)流场模拟的粘性流动模型，分别选用多个粘性流动模型模拟了粗煤泥颗粒在LSFBS内的分选过程，结合相关粘性流动模型附加输运方程特点，讨论了LSFBS流场特定区域内湍流的各向异性和旋度、应变速率梯度分布等对Lam模型和涡粘模型准确度的影响. 结果表明，各模型模拟所得不同密度级组分在重产物中的分配率存在较大差异，其中雷诺应力模型(RSM)模拟结果误差最小，与实验结果的均方根误差为2.21，预测准确度较高；层流(Lam)模型模拟结果误差最大，均方根误差为5.96；涡粘模型中误差最小的为RNG k-e模型，均方根误差为2.46；各粘性流动模型模拟结果准确度为RSM>RNG k-e>SST k-w>标准k-e>标准k-w>S-A>Lam.

关键词: 液固分选流化床, 湍流模型, 计算流体力学, 数值模拟, 流场

Abstract: The separation process of multi-particles of coal in a liquid-solid fluidized bed separator (LSFBS) was simulated with various viscous models, including Reynolds stress (RSM), RNG k-e, SST k-w, Std k-e, Std k-w, S-A and laminar (Lam) models, to examine their application performances in simulation of flow field in LSFBS. The predicted separation results of the partition rate of multi-particles with different densities in the heavy product with these viscous models were obviously different from each other. Specifically, the root-mean-square error (RMSE) of the predicted separation result of RSM, compared with the experimental results, was the smallest, being 2.21. Among the viscous models, Lam gave a most inaccurate result, with a RMSE of 5.96. However, RNG k-e model was the most accurate among the five eddy viscosity models, its RMSE was 2.46. On the whole, the accuracy of these viscous models followed the order of RSM > RNG k-e > SST k-w > Std k-e > Std k-w > S-A>Lam.

Key words: liquid-solid fluidized bed separator, turbulence model, computational fluid dynamics, numerical simulation, flow field

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