DEM-CFD Simulation and Experiments on the Flow Characteristics of Particles in Vortex Pumps
DEM-CFD Simulation and Experiments on the Flow Characteristics of Particles in Vortex Pumps
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涡流泵内颗粒流动特性的DEM-CFD模拟与实验
DOI：
10.3390/w12092444
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发表时间：
2020-08
期刊：
影响因子：
3.4
通讯作者：
Hongfei Wang
中科院分区：
文献类型：
--
作者：
Xiongfa Gao;Weidong Shi;Ruijie Zhao;Ting Zhao;Hongfei Wang
旋涡泵由于其突出的抗堵塞能力，近年来逐渐得到推广和应用。但在输送含固体的污水时，仍会遇到局部堵塞、过劳磨损等问题，因此，掌握固体颗粒在旋涡泵中的流动特性就显得尤为重要。将离散元模型-计算流体力学（DEM-CFD）耦合计算方法引入旋涡泵的数值模拟中，对粒径为1、2和3 mm，浓度为1%和5%的颗粒进行了数值模拟，研究了颗粒的流动特性，并以油菜籽为固体颗粒进行了试验研究。结果表明，CFD计算结果与实验结果吻合较好，其中泵进口段的高速摄影实验结果表明，实验结果与数值模拟结果吻合较好。结果表明，固体颗粒在旋涡泵中有三种典型的运动轨迹：在轨迹A中，颗粒流过叶轮并通过通流进入蜗壳，在轨迹B中，颗粒在循环流的影响下通过侧腔直接进入蜗壳，在轨迹C中，颗粒从叶轮叶片入口的前盖端区域进入叶轮，然后进入蜗壳通过刀片的后半部分区域。结果表明，颗粒主要分布在蜗壳后部。
Due to their outstanding anti-clogging ability, vortex pumps have been gradually promoted and applied in recent years. However, when transporting sewage containing solids, they will still encounter problems such as partial clogging, overwork wear, etc., therefore, it is particularly important to master the flow characteristics of solid particles in the vortex pump. In this paper, the Discrete Element Model-Computational Fluid Dynamics (DEM-CFD) coupled calculation method is introduced into the numerical simulation of vortex pumps and particles with diameters of 1, 2 and 3 mm and concentrations of 1% and 5%, were subjected to numerical simulation and study of the flow characteristics of the particles, then rapeseed was used to represent solid particles in tests. It was obvious that the CFD results were in good agreement with the experimental results, whereby the high speed photography experimental results of the pump inlet section show that the experimental results are consistent with the numerical simulation results. The results show that there are three typical movement tracks of solid particles in the vortex pump: in Track A particles flow through the impeller and enter the volute by the through flow, in Track B particles go directly into the volute through the lateral cavity under the influence of circulation flow and in Track C the particles enter the impeller from the front cover end area of the impeller blade inlet and then into the volute through the back half area of blade. It can be found that the particles are mainly distributed at the back of the volute.
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影响因子：
1.7
作者：
Furukawa, M;Inoue, M;Yamada, K
通讯作者：
Yamada, K
影响因子：
3.9
作者：
Lingjiu Zhou;Lingjie Zhang;L. Bai;W. Shi;Wei Li;Chuan Wang;R. Agarwal
通讯作者：
Lingjiu Zhou;Lingjie Zhang;L. Bai;W. Shi;Wei Li;Chuan Wang;R. Agarwal
影响因子：
3.2
作者：
A. Gerlach;P. Thamsen;S. Wulff;C. Jacobsen
通讯作者：
A. Gerlach;P. Thamsen;S. Wulff;C. Jacobsen
DOI：
10.1115/fedsm2017-69021
发表时间：
2017-07
期刊：
--
影响因子：
--
作者：
A. Gerlach;Dorian Perlitz;Flemming Lykholt-Ustrup;C. Jacobsen;P. Thamsen
通讯作者：
A. Gerlach;Dorian Perlitz;Flemming Lykholt-Ustrup;C. Jacobsen;P. Thamsen
影响因子：
3.9
作者：
Hossein Askaripour;A. Dehkordi
通讯作者：
Hossein Askaripour;A. Dehkordi