基于卡门涡街的静电感应粉尘浓度检测装置的设计
Instrument Technique and Sensor（2020）
Abstract
针对现有的静电感应粉尘浓度测量装置对低浓度、小粒径的粉尘测量不精确的问题,依据卡门涡街的原理,提出在测量管道中安装一个三角柱,来提高粉尘粒子的运动速度和改变粒子的运动趋势,从而增大静电传感器的感应电荷量.利用CFD软件,在Gambit2.4建立实验模型,通过Fluent6.3对优化的测量装置进行气固两相流仿真,得到管道内粉尘粒子的速度云图和压力云图.根据环形静电传感器的感应电荷计算式,计算不同粒径下的感应电荷量.结果表明:优化的装置感应电荷量提高约40％,有效提高粉尘在低浓度、小粒径情况下的测量精度.
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