Numerical study on three-dimensional coupling characteristics for electromagnetism and flow in flat linear induction pump

IF 2.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-09-18 DOI:10.1016/j.anucene.2025.111876

Heyao Li , Zhuqian Zhang , Lixin Yang , Keming Bi , Xin Yan , Haojie Zhang , Xiao Chen

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Abstract

Electromagnetic pump (EMP) is a device that transports liquid metal by Lorentz force generated from the vector product of the magnetic induction intensity and eddy current density in liquid metal. In this paper, a three-dimensional magnetohydrodynamic (MHD) numerical model is constructed for a flat linear induction pump (FLIP). A coupling model between the electromagnetic model and the flow model is proposed by inserting the instantaneous Lorentz force fields as the momentum source term into Navier-Stokes equations (N-S equations) in the form of a segmented function. The characteristics of the temporal and spatial distribution of Lorentz force field on the NaK78 fluid under the joint action of magnetic field and electric field are numerically analyzed. Based on the influence of the temporal and spatial distribution of Lorentz force field, the flow irregularity of liquid metal and the fluctuation characteristics of head in FLIP under the varying flow rate are investigated. In order to accommodate the rapid verification for the design of FLIP, an equivalent coupling model based on changing the form of the Lorentz force field distribution by exploring the influence of the homogeneity of the distribution in both time and space on the head characteristics of FLIP is developed. The accuracy of the MHD numerical model and the equivalent coupling model are verified by comparing with the experimental results of the head that obtained from a principle prototype loop test system of FLIP actually constructed.

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平面线性感应泵内电磁与流量三维耦合特性的数值研究

电磁泵是利用液态金属中磁感应强度与涡流密度矢量积所产生的洛伦兹力来输送液态金属的一种装置。建立了平面线性感应泵（FLIP）的三维磁流体动力学（MHD）数值模型。将瞬时洛伦兹力场作为动量源项以分段函数的形式插入到N-S方程（N-S方程）中，建立了电磁模型与流动模型的耦合模型。数值分析了磁场和电场共同作用下NaK78流体上洛伦兹力场的时空分布特征。基于洛伦兹力场时空分布的影响，研究了不同流量下FLIP中液态金属的流动不均匀性和封头的波动特性。为了适应FLIP设计的快速验证，通过探索时间和空间分布均匀性对FLIP头部特性的影响，建立了基于改变洛伦兹力场分布形式的等效耦合模型。通过与实际搭建的FLIP原理样机回路试验系统的头部试验结果对比，验证了MHD数值模型和等效耦合模型的准确性。

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.