Numerical analysis and performance experiment of electric submersible pump with different diffuser vanes number

Zhou, Lian; Liu, Bai; Shi, Weidong; Wei, Li; Wang, Chuan; Ye, Daoxing

doi:10.1007/s40430-018-0986-y

Cited by 20 publications

(14 citation statements)

References 20 publications

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“…Since the motor and pump were immersed in water, the motor output power (i.e., shaft power) could not be directly measured by a torque meter or dynamometer. Therefore, the motor loss analysis method was used to calculate the shaft power using a no-load test to determine the continuous loss [ 32 , 33 ]. The schematic diagram and test site of the pump test rig is shown in Figure 3 .…”

Section: Comparison Of the Predicted And Experimental Resultsmentioning

confidence: 99%

Effect of Blade Outlet Angle on the Flow Field and Preventing Overload in a Centrifugal Pump

et al. 2020

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The influence of the blade outlet angle on preventing overload in a submersible centrifugal pump and the pump performance characteristics were studied numerically for a low specific speed multi-stage submersible pump. The tested blade outlet angles were 16°, 20°, 24°, 28°, and 32°. The results show that the blade outlet angle significantly affects the external flow characteristics and the power curve can be controlled to prevent overload by properly reducing the blade outlet angle. Increasing the blade outlet angle significantly increases the low pressure area at the impeller inlet, which makes cavitation more likely. Therefore, β2 = 16° provides the best anti-cavitation flow field. Increasing the blade outlet angle also increases the flow separation near the blade working face, which increases the size of the axial vortex along the blade working surface, which rotates in the direction opposite to the impeller rotation and then extends towards the impeller inlet.

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Section: Comparison Of the Predicted And Experimental Resultsmentioning

confidence: 99%

Effect of Blade Outlet Angle on the Flow Field and Preventing Overload in a Centrifugal Pump

et al. 2020

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“…In this study, the k- turbulence model along with PISO algorithm was chosen in numerical simulations. Many studies in the literature have found that the k- turbulence model best fits experimental measurements in centrifugal pumps with reverse pressure gradient and separations (Li et al, 2016, Zhou et al, 2018, Spence and Amaral-Teixeirab, 2008. Eddy viscosity in k- turbulence model based on two equations and Boussinesq Theorem:…”

Section: Solid Model Design Of the Pump And Numerical Setupmentioning

confidence: 94%

“…This trend is a result of significant developments in computer capacities, in parallel with the development of numerical solution methods in recent years. Accordingly, the literature studies on the subject, which include numerical and experimental processes together: (i) The relationship of geometric components with the flow field throughout the pump (Pei et al, 2016;Zhou et al, 2018;Yuanyi et al 2009;Shi et al 2013;Tao et al 2017), (ii) Reliability of numerical simulations in pump design (Yao et al 2016;Maitelli et al 2010;Derakhshan and Nourbersi 2008) and (iii) Effect of fluid viscosity on pump performance . It can be classified under three titles.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of some impeller geometric parameters of an industrial electric submersible pump

Firatoglu

Alihanoglu

2020

Preprint

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Submersible pumps, which are the main means of bringing the ground liquid to the surface, are widely used in agricultural irrigation, petroleum industry, geothermal fields, and similar applications. In most applications, submersible pumps are the main energy inputs of the operating process. Therefore, a small improvement in submersible pump efficiency will significantly reduce the operating cost of the system. The motivation and focus of this study are to experimentally and numerically investigate the effect of the geometric parameters of the submersible pump on the efficiency of the pump. The submersible pump has a design in the form of the serial connection of the stages including the impeller and the diffuser and enters the multi-stage pump category. All the impeller connected to a single shaft rotates at the same angular velocity. Despite the rotation of the impeller at a constant angular speed along with the pump, the flow structure at each stage shows large variations compared to other stages. These differences lead to the formation of a complex flow structure and thus to great difficulties in the experimental identification of the flow field along with the pump. Another difficulty in the experimental definition is that the measured values can show dramatic changes depending on many parameters such as fluid viscosity-temperature, impeller inlet-outlet angle, diffuser inlet-outlet angle, number of blades, the distance between stages, surface roughness. The current general trend is to solve the above-mentioned problems with numerical simulations verified by experimental data. This trend is a result of significant developments in computer capacities parallel to the development of numerical solution methods in recent years. This trend, or the method, has been followed throughout this study. Firstly, within the scope of this study, the performance in different stages of a selected industrial submersible pump was measured by the experimental. Following the measurements, the effects of two basic geometric parameters, such as impeller outlet width and impeller outlet angle on the pump performance were examined with CFD simulations verified by the experimental measurements. This small deviation indicates that the CFD simulation results are in perfect agreement with the experimental measurements. In the simulations performed, it is observed that the time-dependent variables have their size changed but the flow structure does not change. Another striking finding from the CFD simulations carried out is; it has been observed that while geometric arrangements have a partial effect on the flow structure along with the pump, they cause a difference in the critical values on the basic variables that define pump performance, such as pressure.

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“…In the recent decades, a lot of scholars have devoted themselves to the improvement of ESP performance. They have proposed abundant performance optimization methods including orthogonal optimization [3][4][5], numerical calculation [6][7][8][9], and neural network genetic algorithm [10,11] for the structural parameters like the angle of installation, the number of blades, and the wrap angle of the blade.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a High-Speed Electrical Submersible Pump with Different End Clearances

Zhou

Wang

Hang

et al. 2020

Water

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The end clearance of the impeller is one of the most important structural parameters in the hydraulic design of a high-speed electrical submersible pump (ESP). In this paper, an ESP with a rotating speed of 6000 r/min was taken as the research object. Numerical calculations were carried out for five different end clearance conditions of 0.1 mm, 0.3 mm, 0.6 mm, 0.9 mm, and 1.2 mm, respectively, to obtain the performance and internal flow field under different situation. The simulation results were verified by the pump performance experiment. It showed that the increase of the end clearance led to a decrease of the head and efficiency of the electrical submersible pump. Through the analysis of the internal flow field, it was found that the existence of the end clearance reduced the flow rate and caused free pre-whirl. With the increase of the end clearance, the phenomenon of de-flow in the diffuser passage was aggravated, which further reduced the performance of the electrical submersible pump. Finally, the reasonable recommended value of the end clearance was given, which facilitated the optimization design and engineering application of the high-speed ESP.

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Numerical analysis and performance experiment of electric submersible pump with different diffuser vanes number

Cited by 20 publications

References 20 publications

Effect of Blade Outlet Angle on the Flow Field and Preventing Overload in a Centrifugal Pump

Effect of Blade Outlet Angle on the Flow Field and Preventing Overload in a Centrifugal Pump

Experimental and numerical investigation of some impeller geometric parameters of an industrial electric submersible pump

Numerical Investigation of a High-Speed Electrical Submersible Pump with Different End Clearances

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