The Fluid Mechanics of Electrostatic Precipitators
The Fluid Mechanics of Electrostatic Precipitators
复制标题
静电除尘器的流体力学
DOI：
10.1080/02786828508959072
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发表时间：
1985
影响因子：
5.2
通讯作者：
J. C. Hay
中科院分区：
文献类型：
--
作者：
E. Shaughnessy;J. Davidson;J. C. Hay
目前，人们对电体力在除尘器中产生二次流和湍流的作用知之甚少，尽管这些扰动被认为对除尘器的性能有害。本文使用纳维-斯托克斯和简化的麦克斯韦方程对该问题进行了基本分析。结果表明，电流密度的旋转分量会导致气体中产生涡流，因此是二次流和湍流的来源。当电流密度无旋时，电体力会引起压力分布的变化，但对速度场没有影响。由于电流密度分布仅由电极几何形状决定，因此电极的设计应尽量减少电流密度的旋转分量，从而减少气流扰动。
The role of the electric body force in the generation of secondary flows and turbulence in precipitators is poorly understood at present, despite the fact that these disturbances are thought to be detrimental to precipitator performance. This paper undertakes a fundamental analysis of the problem using the Navier-Stokes and reduced Maxwell equations. It is shown that the rotational component of the current density causes vorticity production in the gas, and is therefore the source of secondary flows and turbulence. When the current density is irrotational, the electric body force causes a change in the pressure distribution but has no effect on the velocity field. Since the current density distribution is determined by the electrode geometry alone, the electrodes should be designed to minimize the rotational component of the current density and thus reduce gas flow disturbances.