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Energies 2017, 10(9), 1334; https://doi.org/10.3390/en10091334

Multi-Objective Optimization of the Hydrodynamic Performance of the Second Stage of a Multi-Phase Pump

1
Thermal & Fluid System R&D Group, Korea Institute of Industrial Technology, Cheonan 31056, Korea
2
Department of Mechanical Engineering, Yonsei University, Seoul 03722, Korea
3
Advanced Energy and Technology, University of Science and Technology, Daejeon 34141, Korea
*
Author to whom correspondence should be addressed.
Received: 13 July 2017 / Revised: 26 August 2017 / Accepted: 1 September 2017 / Published: 4 September 2017
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Abstract

Most multi-phase pumps used in crude oil production have been developed to satisfy certain pressure specifications. In the design of these pumps, the flow characteristics of the posterior stage are different from those of the prior stage. For this reason, the design of the second stage needs to be supplemented. To optimize performance in this stage, multi-objective optimization to simultaneously increase pressure and efficiency is reported in this article. Flow analyses of the single and multiple phases of the multi-phase pump were conducted by solving three-dimensional steady Reynolds-averaged Navier–Stokes equations. For the numerical optimization, two design variables related to the blade inlet angle were selected. The impeller and the diffuser blades were optimized using a systematic optimization technique combined with a central composite method and a hybrid multi-objective evolutionary algorithm coupled with a surrogate model. The selected optimal model yielded better hydrodynamic performance than the base model, and reasons for this are investigated through internal flow field analysis. View Full-Text
Keywords: helico-axial pump; multi-phase; multistage; gas volume fraction; interphase forces; numerical optimization; performance validation; surrogate model; design of experiment helico-axial pump; multi-phase; multistage; gas volume fraction; interphase forces; numerical optimization; performance validation; surrogate model; design of experiment
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Suh, J.-W.; Kim, J.-W.; Choi, Y.-S.; Kim, J.-H.; Joo, W.-G.; Lee, K.-Y. Multi-Objective Optimization of the Hydrodynamic Performance of the Second Stage of a Multi-Phase Pump. Energies 2017, 10, 1334.

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