Experimental study and optimized design on electromagnetic pump for liquid sodium

Wang, Liu; Hou, Yandong; Shi, Leitai; Wu, Yingwei; Tian, Wenxi; Dekuan, Song; Qiu, Suizheng; Su, G.H.

doi:10.1016/j.anucene.2018.10.015

Cited by 23 publications

(3 citation statements)

References 13 publications

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“…In [14,15], based on the combination of circuit and magnetic circuit, a new equivalent circuit model for predicting electromagnetic pressure is proposed, whereas the simple end effects coefficient in [1] was still adopted. On this basis, Wang introduced the hydraulic loss including friction pressure loss and form pressure loss, then corrected the electromagnetic pressure by the end correction coefficient of experimental data fitting and carried out the performance optimization design [16]. Although the end effects and saturation problem have been considered in the correction coefficient, this method has some limitations and cannot be applied in the theoretical design stage.…”

Section: Introductionmentioning

confidence: 99%

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply

et al. 2021

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The improved equivalent circuit models considering the end effects are put forward to predict the performance of annular linear induction electromagnetic pump (ALIP) based on the one-dimensional analytical model built in this paper. First, the one-dimensional physical model of ALIP is established, and the analytical expressions of electromagnetic fields are deduced and the impact of the end effects on it is analyzed. Then, two equivalent circuit models including the model only considering the end effects and the model fully taking the end effects and the difference of synchronous velocity among the end effect traveling waves and the fundamental wave into account are developed. Meanwhile, the key impedance parameters in the equivalent circuit models are obtained and the correction coefficients of the impedance generated by the end effects are abstracted. Furtherly, the performances of a small designed ALIP are calculated by the conventional and two improved equivalent circuit models respectively, the results obtained from them are compared with measured data to validate the rationality and feasibility of the models proposed.INDEX TERMS ALIP, electromagnetic field, equivalent circuit, end effect, developed pressure 12

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Section: Introductionmentioning

confidence: 99%

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply

et al. 2021

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“…Shao [6] numerically studied the flow field of a molten salt pump under different viscosity. Wang [7] studied the electromagnetic pump for liquid sodium by experiments and proposed a theoretical model between flow rate and developed pressure of EMP after detailed deduction based on equivalent circuit theory. Hammitt [8] studied the cavitation characteristics of the centrifugal pump during operation with a molten salt medium.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Liquid Molten Salt Pump: Geometry Optimization and Experimental Verification

Wang

et al. 2019

Symmetry

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In order to enhance the hydraulic efficiency of a liquid molten salt pump, the improvement on the pump was carried out through numerical and experimental methods. The internal flow field obtained by the numerical simulation was analysed. The results show that there are low-velocity area in the scroll region and large curvature of the streamline at the outlet. Geometric modification was made by trimming the back-blades of the impeller and filleting the sharp corner of the outlet pipe. The modified pump performance was verified by the experiments. The hydraulic efficiency, the pressure fluctuation, vibration characteristics between the original and modified pump were compared. The results showed that the hydraulic efficiency of the modified pump increased 7.4%. In addition, the pressure fluctuation and vibration intensity were also reduced compared with the original pump. This result shows that the geometric modification improves not only the hydraulic performance but also the structural properties.

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“…This idea was developed in 1970 and different types of electromagnetic pumps were utilized in foundry industries and melt pumping of electricityconductor metals [2]. The alternating current (AC) pumps have higher efficiency in comparison with the direct current (DC) ones; however, their manufacturing cost and maintenance are higher [3]. Common electromagnetic pumps do not make uniform velocity profiles; the fluid velocity in the vicinity of the walls is higher than that in its center.…”

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confidence: 99%

An electromagnetic arrayed pump to create arbitrary velocity profiles in fluid

et al. 2021

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The present paper is conducted to develop a new structure of an electromagnetic pump capable of controlling the magnetic field in a rectangular channel. Common electromagnetic pumps do not create uniform velocity profiles in the cross-section of the channel. In these pumps, an M-shape profile is created since the fluid velocity in the vicinity of the walls is higher than that in its center. Herein, the arbitrary velocity profiles in the electromagnetic pump are generated by introducing an arrayed structure of the coils in the electromagnetic pump and implementing 3D numerical simulation in the finite element software COMSOL. The dimensions of the rectangular channel are 5.5 × 150 mm2. Moreover, the magnetic field is provided using a core with an arrayed structure made of low-carbon iron, as well as five couples of coils. 20% NaoH solution is utilized as the fluid (conductivity: 40 S/m). The arrayed pump is fabricated and experimentally created an arbitrary velocity profile. The pressure of the pump in every single array is 12 Pa and the flow rate is equal to 3375 mm3/s. According to the results, there is a good agreement between the experimental test carried out herein and the simulated models.Article highlights This is the first time that the idea of arrayed electromagnetic pump is presented. This pump uses a special arrayed core with coils; by controlling the current of each coil and the direction of the currents, the magnetic field under the core could be adjusted. By changing the magnetic field at any position in the width of the channel, the Lorentz force alters, which leads to different velocity and pressure profiles. Using COMSOL multiphysics software, the electromagnetic pump was simulated in real size compared to the experimental model. Subsequently, the simulation model was verified and different velocity profiles were generated by activation and deactivation of different coils. The pressure and velocity curves and contours were extracted. The experimental setup was manufactured and assembled. NaOH solution was utilized as the fluid. Afterwards, different modes of coil activations were investigated and the pressure and velocity profiles of the pump were calculated.

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Experimental study and optimized design on electromagnetic pump for liquid sodium

Cited by 23 publications

References 13 publications

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply

The Improved Equivalent Circuit Models Considering End Effects of Annular Linear Induction Electromagnetic Pump for Space Nuclear Power Supply

Performance Improvement of a Liquid Molten Salt Pump: Geometry Optimization and Experimental Verification

An electromagnetic arrayed pump to create arbitrary velocity profiles in fluid

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