Sensitivity Analysis and optimization of the Inducer in a Rotary Gas Separator of Electrical Submersible Pump under single phase and two phase conditions

Authors

1 MSc student, School of Mechanical Engineering, University of Tehran, Tehran, Iran

2 Associate Professor, School of Mechanical Engineering, University of Tehran, Tehran, Iran

Abstract

The inducer is an axial Turbo-machinery installed at the inlet of Rotary Gas Separators of Electrical Submersible Pump to increase the head and overcome the pressure drop of the outlet pipes. In this study the inducer optimization in order to increase the head and the efficiency has been addressed using the computational fluid dynamics,. After the initial design, the inlet angle and outlet angle on the shroud, the position of the leading edge and trailing edge on the shroud as well as the blade thickness, selected as effective parameters. To reduce the computational cost a Surrogates model based on the Kriging model is used to predict the objective function. Flow analysis of the single and two phases are conducted by solving three-dimensional steady Navier–Stokes equations. Inhomogeneous two-phase flow is modeled in the ANSYS-CFX software using the Euler-Euler approach and considering interphase forces. From the genetic algorithm, the values of the parameters in the optimal points are calculated and the results are used for sensitivity analysis. Regarding the sensitivity analysis, the input angle and the blade thickness have the greatest impact on the head and also the outlet angle has the greatest impact on the inducer efficiency. Numerical simulation results show that the optimum geometry in single-phase and two-phase conditions provide more head.

Keywords

Main Subjects

References

[1]  Takacs G (2009) Electrical submersible pumps manual: design, operations, and maintenance. Gulf Professional Publishing, Burlington, USA.
[2] d'Agostino L, Vittoria M (2017) Cavitation instabilities and rotordynamic effects in turbopumps and hydroturbines. Springer 575: 65-107.
[3] Harun AF, Prado MG, Doty DR (2016) Two-phase flow modeling of inducers. Soc Petrol Eng J 126: 140-148.
[4] Alhanati FJS, Sambangi SR, Doty DR, Schmidt Z (1994) A simple model for the efficiency of rotary separators. Technical Conference and Exhibition held in New Orleans.
[5] Harun AF, Prado MG, Shirazi SA (2002) An improved model for predicting separation efficiency of a rotary gas separator in ESP systems. Soc Petrol Eng J 1-4.
[6] Lackner G, Doty DR, Shirazi SA, Schmidt Z (2002) Effect of viscosity on downhole gas separation in a rotary gas separator. Soc Petrol Eng J 28-31.
[7] Harun AF, Prado MG, Doty DR (2003) Design Optimization of a Rotary Gas Separator in ESP Systems. Conference Production and Operations Symposium held in Oklahoma 22-25.
[8] Suarez L, Kenyery F, Asuaje M, Pena M (2005) 3D CFD simulation of rotary gas-separator performance under two-phase-flow condition. Petroleum Eng Conference.
[9] Equipment E (2015) The parametric study of an electrical submersible pump rotary gas separator under two-phase flow condition. Semi-Annually Energy Equipment And Systems 3(1): 33-44.
[10] Gülich JF (2010) Centrifugal pumps. Berlin Heidelberg, Springer.
[11] Westra RW (2008) Inverse-design and optimization methods for  centrifugal pump impellers. PhD Thesis, Department of Mech Eng, Uni of Twente.
[12] https://www.sharcnet.ca/Software/Ansys/16.2.3/ en-us/help/cfx_mod/i1345900.html.
[13]  ANSYS CFX-15.0 Theory Guide of ANSYS CFX 15.0 ANSYS Inc.
[14] Frank T , Zwart PJ , Shi JM , Krepper E  (2005) Inhomogeneous MUSIG model a population balance approach for polydispersed bubbly flow. Conference Nuclear Energy for New Europe.
[15]  Suh J, Kim J, Choi Y, Kim J, Joo W, Lee K (2017) Development of numerical Eulerian-Eulerian models for simulating multiphase pumps. J Petrol Sci Eng 1-14.
[16]  Salim SM, Cheah SC (2009) Wall y+ strategy for Dealing with wall-bounded turbulent flows. Conference of Eng and Computer Scientists.
[17] Cavazzuti M (2013) Optimization methods, from theory to design. Berlin Heidelberg, Springer.
[18] Koziel S, Leifsson L (2013) Surrogate-based modeling and optimization applications in engneering. Springer Verlag New York.
[19]   Lei TAN, Baoshan ZHU, Shuliang CAO, Hao B, Yuming W (2014) Influence of blade wrap angle on centrifugal pump performance by numerical and experimental study. Chin J Mech Eng 171-177.
[20] Zitzler E, Thiele L (1999) Multiobjective evolutionary algorithms : A comparative case study and the strength pareto approach. IEEE T Evolut Comput 3(4): 257-271.
[21] Koziel S, Yang XS (2011) Computational optimization, methods and algorithm. Springer, Berlin, Germany, Vol 356.
Journal of Solid and Fluid Mechanics
Volume 8, Issue 3
October 2018
Pages 289-302

Files

Share

How to cite

Statistics