Modeling and simulation of the gas-liquid separation process in an axial flow cyclone based on the Eulerian-Lagrangian approach and surface film model
Modeling and simulation of the gas-liquid separation process in an axial flow cyclone based on the Eulerian-Lagrangian approach and surface film model
复制标题
基于欧拉-拉格朗日方法和表面膜模型的轴流旋流器气液分离过程建模与仿真
DOI：
10.1016/j.powtec.2019.05.039
复制
发表时间：
2019-07
影响因子：
5.2
通讯作者：
Sun DL
中科院分区：
文献类型：
--
作者：
Deng YJ;Zhang L;Hou H;Yu B;Sun DL
轴流旋风分离器是一种广泛应用于化工、石油、核工业等领域的气液分离设备。轴流旋风分离器内的气液分离过程涉及复杂的现象，包括液滴在壁面上的沉积(形成液膜)、液膜的流动以及液滴在液膜中的夹带。因此，轴流旋风分离器内气液分离过程的CFD模拟是非常具有挑战性的。本文采用欧拉-拉格朗日方法和表面膜模型成功地模拟了轴流旋风分离器内的气液分离过程。气核采用欧拉-拉格朗日方法描述，液膜流动基于二维薄膜假设。然后，利用OpenFOAM实现了该模型，并在不同的实验数据源上进行了验证。随后，利用该模型对旋风分离器内的流场进行了数值模拟，其结果直接影响到旋风分离器的分离性能。在此基础上，对高压旋风分离器内的气液两相流动进行了数值模拟，并对其相关特性进行了分析。研究结果对轴流旋风分离器的设计、运行和优化具有重要意义。
Axial flow cyclones are a widely used gas-liquid separation equipment in the chemical industry, petroleum industry, nuclear industry, etc. The gas-liquid separation process inside an axial flow cyclone involves complex phenomena, including the deposition of droplets on the wall (forming a liquid film), the flow of this liquid film, and the entrainment of droplets in this film. Therefore, CFD simulations of the gas-liquid separation process in an axial flow cyclone are very challenging to perform. In the present study, the gas-liquid separation process inside an axial flow cyclone is successfully modeled using the Eulerian-Lagrangian approach and a surface film model. The gas core is described by the Eulerian-Lagrangian approach, and the liquid film flow is modeled based on a two-dimensional thin-film assumption. Then, the proposed model is implemented by using OpenFOAM and validated against various experimental data sources. Subsequently, the proposed model is employed to simulate the flow field in the cyclone, which directly affects the separation performance. Furthermore, the gas-liquid two-phase flow inside the cyclone with high operating pressure is investigated using the proposed model, and the relevant characteristics are analyzed. The research results are of great significance to the design, operation, and optimization of axial flow cyclones.
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