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research-article

Numerical Study on the First Stage Head Degradation in An Electrical Submersible Pump with Population Balance Model

[+] Author and Article Information
Yiming Chen

Department of Mechanical Engineering, 3127 TAMU, Texas A&M University, College Station, TX 77843
yimingchen.ok@gmail.com

Abhay Patil

Department of Mechanical Engineering, 3127 TAMU, Texas A&M University, College Station, TX 77843
abhyapatil@tamu.edu

Yi Chen

Department of Mechanical Engineering, 3127 TAMU, Texas A&M University, College Station, TX 77843
bagecy@gmail.com

Changrui Bai

Department of Mechanical Engineering, 3127 TAMU, Texas A&M University, College Station, TX 77843
baichangrui@gmail.com

Yintao Wang

Department of Mechanical Engineering, 3127 TAMU, Texas A&M University, College Station, TX 77843
yintao2012@gmail.com

Gerald Morrison

Department of Mechanical Engineering, 3127 TAMU, Texas A&M University, College Station, TX 77843
gmorrison@tamu.edu

1Corresponding author.

ASME doi:10.1115/1.4041408 History: Received April 06, 2018; Revised August 31, 2018

Abstract

Based on previous experiment result, an assumption is made to explain the abnormal head degradation in the first stage of an Electrical Submersible Pump (ESP): the bubbles' breaking up and coalescence effect with compressibility is the main reason of this phenomenon. To investigate the head degradation problem inside the ESP, a series of numerical simulations are performed on the first stage of the split vane impeller pump commonly employed for gas handling purpose. These 3D transient Eulerian multiphase simulations are divided into two groups: one group with the traditional fixed bubble size method, the other with the ANSYS Population Balancing Model (PBM) allowing the bubbles to break up and coalesce. The simulation result with the changing bubble size matches well with the experiment data, which supports the previous assumption. The flow field based on PBM simulation is visualized and analyzed. Also, the separation of phases is discovered with a large volume of gas accumulating at the suction side of the impeller trailing blades, which is also supported by experimental observation.

Copyright (c) 2018 by ASME
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