磁场对电解加工间隙流场影响的仿真分析

A Simulated Analysis on the Influence of Magnetic Field on Interval Flow Field in Electrochemical Machining

为了揭示磁场对电解加工间隙中流场影响的规律,建立了磁场复合电解加工间隙流场分析的数学模型和有限元模型,采用了有限元软件COMSOL Multiphysics,分析了不同方式的磁场作用下间隙中不同流速流场的分布情况。结果表明：在电磁力相对较强处,电磁力表现出对流体的驱动作用,在电磁力相对较弱处,电磁力表现出对流体的阻碍效果;在给定的参数条件下,当磁力线与电场线、流线分别正交时,产生的电磁力与流速平行,电磁力对电解液作用的流速范围为（0~11.6）m/s,在（0~0.2）m/s内对电解液产生上下双向搅拌作用;当磁力线与电场线平行、与流线垂直时,产生的电磁力相对较弱,对电解液的影响效果相对较小,电磁力对电解液作用的流速范围为（0~2.4）m/s;当磁力线与电场线垂直、与流线平行时,产生的电磁力与流线、电场线均正交,电磁力对流体的作用效果相对较强,对电解液作用的流速范围为（0~15.5）m/s,在（0~0.6）m/s内电磁力对电解液产生左右双向搅拌作用。

A mathematical model and finite element model for the analysis of flow field in the gaps of magnetic field combined electrochemical machining were established to disclose the rule of influence of magnetic field on the flow field in the gaps of electrochemical machining. COMSOL Multiphysics, the finite element software, was introduced to analyze the distribution of flow fields of different rates in the gaps under the action of magnetic field in different ways. The result indicates that in the areas of greater electromagnetic force, the fluid is driven by electromagnetic force; in the areas of smaller electromagnetic force, the fluid is hindered by electromagnetic force; under the situations of given parameters, when magnetic line, electric field line and flow line is orthogonal to each other, the electronmgnetic force produced is in parallel with flow rate and the flow rate range of electro--tic force acting on electrolyte is（0-ll.6）m/s Within the range of（0-3.2）m/s, electromagnetic force has upward and downward and bidirectional stirring action on electrolyte; when magnetic line is in parallel with electric field line, and vertical to flow line, the electromagnetic force produced is comparatively weaker and the influence on electrolyte is smaller, and the flow rate range of electromagnetic force acting on electrolyte is （0~2.）4m/s; when ~tic line is vertical to electric field line, and in parallel with flow line, the electro__tic force produced is orthogonal to flow line and electric field line, and the action effect of electromagnetic force on fluid is comparatively stronger. The flow rate range of electromagnetic force acting on electrolyte is （0-15.5）m/s. Within（ 0-0.6 ）m/s , electromagnetic force has rightward and leftward and bidirectional stirring action on electrolyte.