CFD Analysis of Electric Submersible Pumps (ESP) Handling Two-Phase Mixtures
CFD Analysis of Electric Submersible Pumps (ESP) Handling Two-Phase Mixtures
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DOI：
10.1115/1.1725156
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发表时间：
2004-06
影响因子：
3
通讯作者：
J. Caridad;F. Kenyery
中科院分区：
文献类型：
--
作者：
J. Caridad;F. Kenyery
处理两相流的电潜泵（ESP）的行为是主要关注的主题，特别是在石油工业中，其中在石油威尔斯生产中可能发现大量的游离气体。在过去，人们曾多次尝试预测这种泵的性能，然而，由于叶轮内部复杂的流动动力学，已经取得了有限的成功。几何形状，气体空隙率（GVF）和吸入压力似乎是影响ESP性能的主要参数。此外，混合物的GVF越高，泵所经历的压头的降低越高。到目前为止，这个复杂的现象还没有得到很好的理解。在目前的工作中，一个两流体模型用于三维（3D）计算流体动力学模拟，以获得的压力，液体和气体的速度场，以及GVF分布内的ESP叶轮的已知的几何形状;使用流量，气泡直径和GVF在吸入作为独立变量和不可压缩流体的假设。计算结果与实验结果吻合较好。从模拟中获得的变量是允许预测不同GVF的泵的性能曲线的基石，并且这样可以估计泵的压头退化。
The behavior of electric submersible pumps (ESP) handling two-phase flow is a subject of primary concern, especially in the petroleum industry, where significant amounts of free gas may be found in oil wells production. In the past, several attempts were made to predict the performance of such kind of pumps, nevertheless, limited success has been achieved due to the complex flow dynamics inside the impeller Geometry, gas void fraction (GVF) and suction pressure seem to be the main parameters affecting ESP performance. Furthermore, the higher the GVF of the mixture is, the higher the degradation of head that is experienced by the pump. So far, this complex phenomenon has not been well understood. In the present work, a two fluid model is used in three-dimensional (3D) CFD simulations to obtain the pressure, liquid and gas velocity fields as well as the GVF distribution inside an ESP impeller of known geometry; using flow rates, bubble diameter and GVF at the suction as independent variables and an incompressible fluid hypothesis. The gas pocket in the impeller blade reported by other researchers is obtained and comparison with experimental results shows good agreement. The obtained variables from the simulations are the cornerstone that allows the prediction of the performance curve of the pump for different GVF and such, lets the head degradation of the pump be estimated.