Multi-objective shape optimization of helico-axial multiphase pump impeller based on NSGA-II and ANN

Zhang, Jinya; Zhu, Hongwu; Yang, Chun; Yan, Li; Wei, Huan

doi:10.1016/j.enconman.2010.07.029

Cited by 137 publications

(62 citation statements)

References 23 publications

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“…The suction unit, several compression cells, and the exit unit constitute the entire flow passage of an MPP. 21 The gas-liquid mixture gains kinetic energy while it flows through the impeller. When the mixture flows through the diffuser, its speed will decrease, and part of the kinetic energy will be converted to pressure energy.…”

Section: Characteristics Of Rotodynamic Mppmentioning

confidence: 99%

Investigation of gas–liquid two-phase flow in a three-stage rotodynamic multiphase pump via numerical simulation and visualization experiment

Zhang

Cai

et al. 2016

Advances in Mechanical Engineering

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To investigate the gas-liquid two-phase flow in a three-stage multiphase pump, numerical simulations and visualization experiments were performed. A mixture of air and water was selected as the medium. A three-dimensional flow field of the three-stage multiphase pump designed by authors was simulated employing the commercial computational fluid dynamics software ANSYS-CFX to solve the Navier-Stokes equations for steady flow and unsteady flow. The differential pressure of each stage and change characteristic of gas volume fraction under various inlet gas volume fraction were compared via steady simulations. The distribution characteristics of pressure and gas volume fraction in three stages were studied, and the movement of gas pockets in impellers was discovered via unsteady simulations as well. Four types of flow patterns were observed during the visualization experiments with the increasing inlet gas volume fraction. The results of the experiment reveal that the positions and characteristics of the gas pocket were similar to the results from the unsteady simulations, which verify the reliability of the simulations.

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Section: Characteristics Of Rotodynamic Mppmentioning

confidence: 99%

Investigation of gas–liquid two-phase flow in a three-stage rotodynamic multiphase pump via numerical simulation and visualization experiment

Zhang

Cai

et al. 2016

Advances in Mechanical Engineering

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“…The numerical mesh was generated by Ansys ICEM, where yplus ∈ [30,150]. Then, the steady-state simulation is performed to achieve such time-averaged characteristics as pump head, torque and efficiency.…”

Section: Grid Irrelevance Analysismentioning

confidence: 99%

“…A multiobjective method was performed to optimize a helicoaxial pump impeller shape [30]. Monitoring and controlling strategy is an alternative procedure which can be calibrated to manage energy consumption of overall turbomachine systems.…”

Section: Introductionmentioning

confidence: 99%

A New Proposed Return Guide Vane for Compact Multistage Centrifugal Pumps

Zhang

Shi

et al. 2013

International Journal of Rotating Machinery

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For widely used multistage centrifugal pumps, their former structures are so bulky that nowadays growing interest has been shifted to the development of more compact structures. Following this trend, a compact pump structure is provided and analysed. To maintain the pump's pressure recovery, as well as to meet the water flow from the impeller, a circumferential twisted return guide vane (RGV) is proposed. To validate this design method, the instantaneous CFD simulations are performed to investigate the rotorstator interventions. Within the impeller, the pressure fluctuation is cyclic symmetry, where the impeller frequency dominates. At the zone where flow leaves impeller for RGV, the pressure fluctuation is nonperiodic, the impeller frequency is major, and the rotation frequency is secondary. Within RGV, the periodic symmetric fluctuation is recovered, where the rotation frequency is governing. The fluctuation decreases from seven cycles within impeller to two cycles within RGV, indicating that the flow from impeller is well handled by RGV. To examine the pump's performance, a prototype multistage pump is designed. The testing shows that the pump efficiency is 57.5%, and the stage head is 9 m, which is comparable to former multistage centrifugal pumps. And this design is more advantageous in developing compact multistage centrifugal pumps.

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“…The inverse design method was coupled with the computational fluid dynamics (CFD) and an optimizer for single-objective numerical optimization [3,4]. Multi-point or multi-objective optimization has also been proposed to design experiments combined with multi-objective evolutionary algorithms [5,6]. The trend toward multi-disciplinary approaches has led to the consideration of more design variables and objective functions for such pumps.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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.

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Multi-objective shape optimization of helico-axial multiphase pump impeller based on NSGA-II and ANN

Cited by 137 publications

References 23 publications

Investigation of gas–liquid two-phase flow in a three-stage rotodynamic multiphase pump via numerical simulation and visualization experiment

Investigation of gas–liquid two-phase flow in a three-stage rotodynamic multiphase pump via numerical simulation and visualization experiment

A New Proposed Return Guide Vane for Compact Multistage Centrifugal Pumps

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

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