电磁传感器磁流场仿真研究

Study on Magnetic-Flow Field Coupling Simulation of Electromagnetic Senor

针对舰船测速设备电磁传感器的磁流场分布提出了一种数值模拟方法,采用Maxwell软件计算交变磁场,并提取瞬态磁场导入Fluent软件中,通过MHD模块对流场、磁场等多物理场进行耦合数值模拟。采用该方法分析了相对磁导率、电流等对感应电场的影响,在一定范围内,感应电动势与相对磁导率、电流成线性关系,两者增大到一定程度后均会引起磁饱和,此时感应电动势无明显变化。研究结果可为电磁传感器的优化设计提供参考。

A numerical simulation method is proposed for the magnetic flow field distribution of the electromagnetic sensor of the speed measuring device on the ship.In this paper,the Maxwell software is used to calculate the alternating magnetic field.The transient magnetic field is extracted and imported into the Fluent software.The coupled numerical simulation of the flow field and magnetic field is carried out by the MHD module.The influence of relative magnetic permeability and current on the induced electric field is analyzed by this method.Within a certain range,the induced electromotive force has a linear relationship with the relative magnetic permeability and current.When the relative magnetic permeability and current increase to a certain extent,they will cause magnetic saturation and the induced electromotive force has no obvious change.Research results can provide reference for the opti⁃mal design of electromagnetic sensors.