Abstract
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.
Highlights
Electromagnetic pump (EMP) [1] plays an important role in the cooling process of the liquid metal cooled nuclear reactor and space nuclear reactor power supply [2,3,4]
The current in the liquid metal of annular linear induction electromagnetic pump (ALIP) is induced by an alternating magnetic field originated from the excitation windings, thereby the inherent problems associated with electrode corrosion of the conduction EMPs are virtually non-existent [6]
Z.ZHANG et al: The improved equivalent circuit models considering end effects of annular linear induction electromagnetic pump minor hydraulic pressure loss calculated by the empirical coefficient, and discussed the influence of different characteristic parameters on P-Q characteristic curve and efficiency of the electromagnetic pump [10,11,12,13]
Summary
Electromagnetic pump (EMP) [1] plays an important role in the cooling process of the liquid metal cooled nuclear reactor and space nuclear reactor power supply [2,3,4]. Z.ZHANG et al: The improved equivalent circuit models considering end effects of annular linear induction electromagnetic pump minor hydraulic pressure loss calculated by the empirical coefficient, and discussed the influence of different characteristic parameters on P-Q characteristic curve and efficiency of the electromagnetic pump [10,11,12,13]. 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. The equivalent circuit model proposed previously more considers the role of the fundamental magnetic field, and less or simpler considers the influence of the end effect on the electromagnetic pressure of ALIP. The performance of a small ALIP is calculated by the equivalent circuit models, the results obtained from the proposed equivalent circuit models are compared with measured data to validate the rationality and accuracy of this new model
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