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Study on Separation Performance of Charged Particles in Rotating Annular Channel

DOI：

 作者 单位 邮编 沈家鑫 中国计量大学浙江省流量计量技术研究重点实验室 310018 彭慧 中国计量大学浙江省流量计量技术研究重点实验室 王彦入 中国计量大学浙江省流量计量技术研究重点实验室 尹招琴 中国计量大学浙江省流量计量技术研究重点实验室 310018 包福兵 中国计量大学浙江省流量计量技术研究重点实验室

为研究带电旋转环形通道内荷电颗粒的运动和沉积特性，本文使用计算流体力学两相流离散颗粒法对带电旋转环形通道内的荷电颗粒的运动过程进行了模拟。根据模拟结果分析了不同粒径、电压、入口雷诺数、通道长径比等参数对荷电颗粒运动和沉积的影响，研究了荷电颗粒在旋转通道内离心力与电场力之间的竞争关系，探索了离心力和电场力导致的荷电颗粒运动和沉积变化的规律。结果表明，单个不同粒径颗粒具有不同的颗粒逃逸电压区间，区间的大小随着颗粒粒径的增大而增大，且区间的宽度随着通道长径比的增大将会明显变小；多个颗粒的逃逸率曲线，不同粒径的颗粒将会有不同程度的交叉，随着长径比的增大，颗粒逃逸率曲线的高度与交叉会有明显的减小，而随着转速的增大，颗粒逃逸率曲线的交叉会有一定程度的减小，且高度不会有明显变化。

In order to study the motion and deposition characteristics of charged particles in the charged rotating annular channel, the computational fluid dynamics with two-phase flow discrete particle method was used to simulate the motion process of the charged particles in the charged rotating annular channel. According to the simulation results, the effects of different particle size, voltage, inlet Reynolds number and channel parameters on the movement and deposition of charged particles have been analyzed. The competitive relationship between the centrifugal force and the electric field force of the charged particles in the rotating channel has been studied, and the laws of the motion and deposition of the charged particles caused by the centrifugal force and the electric field force were explored. The results show that a single particle with different particle sizes has different escape voltage intervals. The size of the interval increases with the increase of particle size, and the width of the interval decreases significantly with the increase of aspect ratio. For the escape rate curves of multiple particles, particles with different diameters will have different degrees of intersection. With the increase of the aspect ratio, the height and cross of the escape rate curves of particles will decrease significantly, while with the increase of the rotational speed, the intersection of the escape rate curves of particles will decrease to a certain extent, and the height will not change significantly.
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