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In this paper, the unsteady solid-liquid two-phase flow in an IS type centrifugal pump is simulated numerically, using the discrete element method (DEM) combined with the CFD method. With the coupling of the codes of the EDEM and the Fluent, the motions of the solid particles and their effects on the pump performance are investigated. In the simulation, the solid particles are 1500 kg/m3 in density, 15% in the volume rate at the pump inlet, 1.0-3.0 mm in sizes in a random distribution. 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科技导报
| 研究论文 2014, 32(27): 28-31
运用CFD-DEM耦合模拟计算离心泵内非稳态固液两相流动
全屏
黄思, 杨富翔, 宿向辉
作者信息
华南理工大学机械与汽车工程学院, 广州510640
Unsteady Numerical Simulation for Solid-Liquid Two-Phase Flow in Centrifugal Pump by CFD-DEM Coupling
Affiliations
出版时间: 2014-09-28
doi: 10.3981/j.issn.1000-7857.2014.27.004
文章导航
对于泵内固液两相流数值模拟，一般方法是将固体颗粒相视为拟流体，采用多相流的CFD 方法进行计算，但这难以体现固体颗粒形状大小、碰撞、凝聚和分离等特性。本文以工程中常用的IS 型离心泵作为研究对象，运用DEM 离散元法结合CFD 方法，采用EDEM-Fluent 耦合，模拟计算离心泵内非稳态固液两相流动，探索泵内固体颗粒群运动规律及其对外特性的影响。计算采用的固体颗粒密度为1500 kg/m3 ，泵入口固相体积率为15%，粒径在1.0～3.0 mm 范围内随机变化。计算得到了固液两相泵随时间的外特性变化，包括泵扬程、泵内固体颗粒体积的变化规律；得到了泵内固体颗粒群的运动轨迹和固相体积率分布等有价值的结果。
CFD-DEM耦合
/
离心泵固液两相流
/
颗粒群轨迹
/
非稳态数值模拟
In a numerical simulation of the solid-liquid two-phase flow in pumps, the conventional approach is to treat solid particles as a kind of quasi-fluid, using the CFD in the multiphase flow case, but in this way, the characteristics of the solid particles, such as the shape and size, the collision, the agglomeration and the separation, can not be reasonably represented. In this paper, the unsteady solid-liquid two-phase flow in an IS type centrifugal pump is simulated numerically, using the discrete element method (DEM) combined with the CFD method. With the coupling of the codes of the EDEM and the Fluent, the motions of the solid particles and their effects on the pump performance are investigated. In the simulation, the solid particles are 1500 kg/m3 in density, 15% in the volume rate at the pump inlet, 1.0-3.0 mm in sizes in a random distribution. Some valuable conclusions are reached, including the time-dependent head, the particle trajectories and the solid volume rate distributions in the centrifugal pump.
CFD-DEM coupling
/
solid-liquid two-phase flow in centrifugal pump
/
trajectories of particle group
/
unsteady numerical simulation
黄思, 杨富翔, 宿向辉.
运用CFD-DEM耦合模拟计算离心泵内非稳态固液两相流动.
科技导报,
2014
, 32
(27)
: 28
-31
.
DOI: 10.3981/j.issn.1000-7857.2014.27.004
HUANG Si, YANG Fuxiang, SU Xianghui.
Unsteady Numerical Simulation for Solid-Liquid Two-Phase Flow in Centrifugal Pump by CFD-DEM Coupling[J].
Science & Technology Review ,
2014
, 32
(27)
: 28
-31
.
DOI: 10.3981/j.issn.1000-7857.2014.27.004
2014年第32卷第27期
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文章信息
doi: 10.3981/j.issn.1000-7857.2014.27.004
接收时间：2014-07-30
首发时间：2014-09-30
出版时间：2014-09-28
收稿日期：2014-07-30
修回日期：2014-08-11
https://castjournals.cast.org.cn/joweb/kjdb/CN/10.3981/j.issn.1000-7857.2014.27.004
引用本文
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2种不同金属材料的力学参数
科 属数 种数 占总种数比例 属 种数 占总种数比例 鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78 小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39 多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39 红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87 小菇属 Mycena 11 5.26 光柄菇属 Pluteus 5 2.39 红菇属 Russula 17 8.13 栓菌属 Trametes 5 2.39
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