Optimization design method of multi-stage multiphase pump based on Oseen vortex

Liu, Ming; Tan, Lei; Xu, Ye; Cao, Shuai

doi:10.1016/j.petrol.2019.106532

Cited by 65 publications

(41 citation statements)

References 39 publications

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“…The hub inlet angle and shroud inlet angle were selected as design variables and optimized using a systematic optimization technique combined with a central composite method and a hybrid multi-objective evolutionary. Liu et al 11 proposed a novel method to optimize performance of a three stage multiphase pump by theoretical prediction based on Oseen vortex. The velocity moment of flow field downstream diffuser was predicted according to established theoretical model and it is applied to optimize inlet blade angle of next impeller.…”

Section: Introductionmentioning

confidence: 99%

Proposal of a stage-by-stage design method and its application on a multi-stage multiphase pump based on numerical simulations

Shi

Zhu

2021

Advances in Mechanical Engineering

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Rotodynamic multiphase pumps are usually equipped with many compression units to provide sufficient boosting pressure for the transportation of production fluid in gas oil field. It is a challenge to maintain pump performance while flow parameters in each stage vary due to the compressibility of gas-liquid phase. In this article, a stage-by-stage design method is proposed to improve the boosting capability of a multiphase pump. Variations of flow parameters in each stage are investigated based on computational fluid dynamics (CFD) numerical simulation. Available methods to determinate main impeller geometry parameters of impeller are discussed. The stage-by-stage design method is applied on a five-stage multiphase pump when the inlet gas volume fraction (GVF) are 30% and 50% separately. The second stage is modified base on its corresponding inlet flow parameters when inlet GVF is 30% while the second and third stage are modified when inlet GVF is 50%. Flow parameters, pressure distribution and velocity distribution are compared between the original pump and modified pump. Differential pressure of the modified pump increases by 53.72 kPa and 58.57 kPa respectively when inlet GVFs are 30% and 50%. The feasibility of the stage-by-stage design method is verified through the comparison results.

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Section: Introductionmentioning

confidence: 99%

Proposal of a stage-by-stage design method and its application on a multi-stage multiphase pump based on numerical simulations

Shi

Zhu

2021

Advances in Mechanical Engineering

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“…In the field of fluid machinery, more and more schemes are implemented and verified via efficient and energy-saving CFD. [11][12][13][14][15][16][17][18] As a new scientific research method, it plays an increasingly important role. Many researchers have studied the internal flow field of centrifugal compressor by numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Liang

Xiang

Wei

et al. 2021

Advances in Mechanical Engineering

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The distribution and characteristics of internal flow field of the impeller with crack damage in service environment was investigated via numerical simulation with RNG k-ε turbulence model. The diffuser and volute are added based on the original impeller to simulate the internal flow field comprehensively. It was found that along the flow direction, the pressure, velocity, and temperature of the fluid increase continuously, and the maximum value appears near the outlet of the impeller. The maximum pressure and velocity in the crack area are distributed around the middle section and the trailing edge of the crack. Entropy production theory was applied in the study of internal flow, which reveals that the entropy production becomes larger around the crack. The further propagation of the crack is promoted by the opening force perpendicular to the entrance direction of the middle crack, the corrosion propagation at the rear edge of the crack, and the thermal deformation of the blade. The accelerated crack process will finally lead to the blade fracture accident.

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“…In the optimization design of a multiphase pump, Ming L. et al [17] suggested an updated approach aiming to create an optimize performance of multi-stage multiphase pump in virtue by theoretical prediction on the basis of an Oseen vortex; the pump head and efficiency could have an improvement at a rate of 0.29% and 0.19% on average following the application of the optimization approach. Liu M. et al [18] also proposed a hydraulic design approach of a controllable blade angle oriented with a multiphase pump based on an impeller and diffuser; the results revealed that the distributions of GVF as well as the pressure would be of more uniformity following the optimization, thus enhancing transporting performance of the pump.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Gas Volume Fraction on the Pressure Load of the Multiphase Pump Blade

et al. 2021

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The gas volume fraction (GVF) often changes from time to time in a multiphase pump, causing the power capability of the pump to be increasingly affected. In the purpose of revealing the pressure load characteristics of the multiphase pump impeller blade with the gas-liquid two-phase case, firstly, a numerical simulation which uses the SST k-ω turbulence model is verified with an experiment. Then, the computational fluid dynamics (CFD) software is employed to investigate the variation characteristics of static pressure and pressure load of the multiphase pump impeller blade under the diverse inlet gas volume fractions (IGVFs) and flow rates. The results show that the effect of IGVF on the head and hydraulic efficiency at a small flow rate is obviously less than that at design and large flow rates. The static pressure on the blade pressure side (PS) is scarcely affected by the IGVF. However, the IGVF has an evident effect on the static pressure on the impeller blade suction side (SS). Moreover, the pump power capability is descended by degrees as the IGVF increases, and it is also descended with the increase of the flow rate at the impeller inlet. Simultaneously, under the same IGVF, with the increase of the flow rate, the peak value of the pressure load begins to gradually move toward the outlet and its value from hub to shroud is increased. The research results have important theoretical significance for improving the power capability of the multiphase pump impeller.

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Optimization design method of multi-stage multiphase pump based on Oseen vortex

Cited by 65 publications

References 39 publications

Proposal of a stage-by-stage design method and its application on a multi-stage multiphase pump based on numerical simulations

Proposal of a stage-by-stage design method and its application on a multi-stage multiphase pump based on numerical simulations

Numerical study on the flow characteristics of centrifugal compressor impeller with crack damage

Effect of the Gas Volume Fraction on the Pressure Load of the Multiphase Pump Blade

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