Numerical investigation of pump performance and internal characteristics in ALIP with different winding schemes

Zhao, Ran; Li, Huiwen; Zhang, Desheng; Huang, Jun; Shi, Weidong

doi:10.3233/jae-170086

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…A numerical model based on time harmonics finite difference method was created by Lee and Kim [13], and they studied some important characteristics of the ALIP, such as eddy current, DSF pressure pulsation, and Lorentz force under various flow rates. Zhao et al [14] created a 2D model to study the effects of different winding schemes on both the pump performance and the internal flow.…”

Section: Gailitis and Lielausismentioning

confidence: 99%

Analysis on the Inception of the Magnetohydrodynamic Flow Instability in the Annular Linear Induction Pump Channel

Zhao

Xiaohui

Pan

et al. 2021

Journal of Fluids Engineering

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Flow instability is the intricate phenomenon in the Annular Linear Induction Pump when the pump runs at off-design working condition. A 3D numerical model is built to simulate the flow in the pump channel. The pump heads at different flow rates are accurately predicted by comparing with experiment. The simulation results show the fluid velocity is circumferentially non-uniform in the pump channel even at the nominal flow rate. The flow in the middle sector continuously decelerates to nearly zero with the reducing flow rate. Reversed flow occurs in the azimuthal plane, followed by vortex flow. The reason for the heterogeneous velocity field is attributed to the mismatch between non-uniform Lorentz force and relatively even pressure gradient. It is seen that the flow in the region of small Lorentz force has to sacrifice its velocity to match with the pressure gradient. An analytic expression of the axial Lorentz force is then developed and it is clearly demonstrated the Lorentz force could be influenced by the profiles of velocity and radial magnetic flux density. The coupling between velocity and magnetic field is studied by analyzing the magnitudes of different terms in the dimensionless magnetic induction equation. It is found the dissipation term is determined not only by the magnetic Reynolds number but the square of wave number of the disturbance in each direction. The smaller disturbing wave number weakens the dissipating effect, resulting in the larger non-uniform magnetic field and axial Lorentz force.

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Section: Gailitis and Lielausismentioning

confidence: 99%

Analysis on the Inception of the Magnetohydrodynamic Flow Instability in the Annular Linear Induction Pump Channel

Zhao

Xiaohui

Pan

et al. 2021

Journal of Fluids Engineering

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show abstract

“…However, the flow instability was not analyzed in the model for that the full-scale flow channel was not simulated in this work and the unstable flow was not observed. Zhao et al built a 2D coupling numerical model [23] and further a 3D fullscale numerical model to study the internal unstable flows [24]. It is found that the competition between the axial components of the Lorentz force and pressure gradient in the flow dominates the vortical evolution, and the magneticfluid coupling can amplify the small disturbance in either the magnetic field or the fluid.…”

Section: Introductionmentioning

confidence: 99%

Active Flow Control of the Magnetohydrodynamic Flow in an Annular Linear Induction Pump by Modifying the Driving Electromagnetic Field

Wang,

Zhang

et al. 2024

International Journal of Energy Research

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The strong coupling between fluid and electromagnetic field in the annular linear induction pump (ALIP) can gradually amplify small disturbance in the fluid field into large-scale vortices. The appearance of the vortices seriously affects the efficiency and reliability of the pump. An active flow control method based on the modification of the driving electromagnetic field is proposed to improve the flow stability. A simplified numerical model of the ALIP is established to simulate the three-dimensional flow in the annular flow channel, and the internal electromagnetic field is modified by using the modulated surface current. The influences of the active flow control method on the flow behavior, pressure pulsation, and energy conversion are, respectively, investigated based on the simulation results. The results show that the modulated surface current can accelerate the vortical evolution. The size and strength of the vortices are suppressed in the modified electromagnetic field. The pressure pulsation low frequency at the ALIP’s outlet is significantly reduced when the modulated surface current density reaches a certain level. The surges in the processes of energy conversion become more gentle within the control method, and the overall energy efficiency is slightly reduced even at the highest modulated surface current density.

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“…Therefore, the operating condition of wind pump is in variation. The traditional design method of vaned pump will not satisfy the requirements of ultra-wide operating condition of WECP [1][2][3]. Therefore, it is urgent to expand the high efficiency region of WECPs, improve the efficiency of pump system, and optimize the matching characteristics of volute and impeller, which is of great significance for energy conservation and consumption reduction of wind power pumping system.…”

Section: Introductionmentioning

confidence: 99%

Expansion of High Efficiency Region of Wind Energy Centrifugal Pump Based on Factorial Experiment Design and Computational Fluid Dynamics

Wei

Shi

et al. 2020

Energies

Self Cite

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The wind energy pump system is a new green energy technology. The wide high efficiency region of pump is of great significance for energy conservation of wind power pumping system. In this study, factorial experiment design (FED) and computational fluid dynamics (CFD) are employed to optimize the hydraulic design of wind energy centrifugal pump (WECP). The blade outlet width b2, blade outlet angle β2, and blade wrap angle ψ are chosen as factors of FED. The effect of the factors on the efficiency under the conditions of 0.6Qdes, 0.8Qdes, 1.0Qdes, and 1.4Qdes is systematically analyzed. The matching feature of various volute tongue angle with the optimized impeller is also investigated numerically and experimentally. After the optimization, the pump head changes smoothly during full range of flow condition and the high efficiency region is effectively improved. The weighted average efficiency of four conditions increases by 2.55%, which broadens the high efficiency region of WECP globally. Besides, the highest efficiency point moves towards the large flow conditions. The research results provide references for expanding the efficient operation region of WECP.

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Numerical investigation of pump performance and internal characteristics in ALIP with different winding schemes

Cited by 5 publications

References 15 publications

Analysis on the Inception of the Magnetohydrodynamic Flow Instability in the Annular Linear Induction Pump Channel

Analysis on the Inception of the Magnetohydrodynamic Flow Instability in the Annular Linear Induction Pump Channel

Active Flow Control of the Magnetohydrodynamic Flow in an Annular Linear Induction Pump by Modifying the Driving Electromagnetic Field

Expansion of High Efficiency Region of Wind Energy Centrifugal Pump Based on Factorial Experiment Design and Computational Fluid Dynamics

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