Numerical Flow Simulation in a Centrifugal Pump at Design and Off-Design Conditions

Cheah, Kean Wee; Lee, T. S.; Winoto, S. H.; Zhao, Zhijian

doi:10.1155/2007/83641

Cited by 78 publications

(48 citation statements)

References 25 publications

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“…The complex flow pattern inside the centrifugal pump is strong three dimensional with recirculation flows at inlet and exit, flow separation, cavitations. The curvatures of the blades and the rotational system have great influence on the flow field (Cheah and Lee, 2007). The meridional velocity and its effect on the performance of the pump can be improved by using proper vane geometric features (Miyauchi et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics analysis of a mixed flow pump impeller

Manivannan¹

2011

Int. J. Eng. Sci. Tech

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To improve the efficiency of mixed flow pump, Computational Fluid Dynamics (CFD) analysis is one of the advanced tools used in the pump industry. A detailed CFD analysis was done to predict the flow pattern inside the impeller which is an active pump component. From the results of CFD analysis, the velocity and pressure in the outlet of the impeller is predicted. CFD analyses are done using Star CCM+ software. These outlet flow conditions are used to calculate the efficiency of the impeller. The calculated value of efficiency from the empirical relations is 55%. The optimum inlet and outlet vane angles are calculated for the existing impeller by using the empirical relations. The CAD models of the mixed flow impeller with optimum inlet and outlet angles are modeled using CAD modelling software ProE WF3. To find the relationship between the vane angles and the impeller performance the optimum vane angle is achieved step by step. Three CAD models are modeled with the vane angles between existing and optimum values. These models are analyzed individually to find the performance of the impeller. In the first case, outlet angle is increased by 5°. From the outlet flow conditions, obtained from the CFD analysis, it is evident that the reduced outlet recirculation and flow separation cause the improved efficiency. By changing the outlet angle the efficiency of the impeller is improved to 59%. In the second case inlet angle is decreased by 10%. The efficiency of the impeller in this case is 61%. From this analysis it is understood that the changes in the inlet vane angle did not change the efficiency of the impeller as much as the changes in outlet angle. In the third case, impeller with optimum vane angles is analyzed and the outlet flow conditions are predicted. From the CFD analysis the efficiency of the impeller with optimum vane angles is calculated as 65%. Thus, efficiency of the mixed flow impeller is improved by 18.18% by changing the inlet and outlet vane angles.

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Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics analysis of a mixed flow pump impeller

Manivannan¹

2011

Int. J. Eng. Sci. Tech

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“…With the development of computational algorithms and computer technology, (CFD) Computational Fluid Dynamics has become a power tool to calculate the unsteady flow in radial pumps [2][3][4][5][6][7]. Particle Image Velocimetry (PIV) is a noncontact measurement technique for obtaining instantaneous velocity field, in which the measured property is the distance travelled by seeding particles in the flow within a known time interval [8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Periodic Flow Fields in a Radial Pump among CFD, PIV, and LDV Results

Feng

Benra

Dohmen

2009

International Journal of Rotating Machinery

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The interaction between the impeller and the diffuser is considered to have a strong influence on the unsteady flow in radial pumps. In this paper, the unsteady flow in a low specific speed radial diffuser pump has been simulated by the CFD code CFX-10. Both Particle Image Velocimetry (PIV) and Laser Doppler Velocimetry (LDV) measurements have been conducted to validate the CFD results. Both the phase-averaged velocity fields and the turbulence fields obtained from different methods are presented and compared, in order to enhance the understanding of the unsteady flow caused by the relative motion between the rotating impeller and the stationary diffuser. The comparison of the results shows that PIV and LDV give nearly the same phase-averaged velocity fields, but LDV predicts the turbulence much clearer and better than PIV. CFD underestimates the turbulence level in the whole region compared with PIV and LDV but gives the same trend.

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“…Using a 3D CFD code with the frozen-rotor interface model, the internal flow inside centrifugal pumps can be simulated, including velocity and pressure fields [86][87][88] as well as flow recirculation and separation [89,90]. The frozen-rotor model is considered as steady-state simulation because it holds the rotating and stationary parts in two separate reference frames.…”

Section: Three-dimension Computational Fluid Dynamics (Cfd)mentioning

confidence: 99%

A Review of Experiments and Modeling of Gas-Liquid Flow in Electrical Submersible Pumps

Zhu

Zhang

2018

Energies

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As the second most widely used artificial lift method in petroleum production (and first in produced amount), electrical submersible pump (ESP) maintains or increases flow rate by converting kinetic energy to hydraulic pressure of hydrocarbon fluids. To facilitate its optimal working conditions, an ESP has to be operated within a narrow application window. Issues like gas involvement, changing production rate and high oil viscosity, greatly impede ESP boosting pressure. Previous experimental studies showed that the presence of gas would cause ESP hydraulic head degradation. The flow behaviors inside ESPs under gassy conditions, such as pressure surging and gas pockets, further deteriorate ESP pressure boosting ability. Therefore, it is important to know what parameters govern the gas-liquid flow structure inside a rotating ESP and how it can be modeled. This paper presents a comprehensive review on the key factors that affect ESP performance under gassy flow conditions. Furthermore, the empirical and mechanistic models for predicting ESP pressure increment are discussed. The computational fluid dynamics (CFD)-based modeling approach for studying the multiphase flow in a rotating ESP is explained as well. The closure relationships that are critical to both mechanistic and numerical models are reviewed, which are helpful for further development of more accurate models for predicting ESP gas-liquid flow behaviors.

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Numerical Flow Simulation in a Centrifugal Pump at Design and Off-Design Conditions

Cited by 78 publications

References 25 publications

Computational fluid dynamics analysis of a mixed flow pump impeller

Computational fluid dynamics analysis of a mixed flow pump impeller

Comparison of Periodic Flow Fields in a Radial Pump among CFD, PIV, and LDV Results

A Review of Experiments and Modeling of Gas-Liquid Flow in Electrical Submersible Pumps

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