摘要
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。
Aiming at the problem that the existing electrostatic induction dust concentration measuring device is not accurate in the measurement of low concentration and small particle diameter,according to the principle of Carmen vortex street,it is proposed to install a triangular column in the measuring pipeline to improve the speed of dust particles and change the movement trend of particles,so as to increase the induced charge of electrostatic sensors.Using CFD software,the experimental model is established in Gambit2.4,and the gas-solid two-phase flow simulation of the optimized measuring device is carried out by Fluent6.3.The velocity cloud picture and pressure cloud diagram of dust particles in the pipeline are obtained.According to the formula of induction charge of annular electrostatic sensor,induction charge of different particles are calculated.The results show that the induction charge of the optimized device is increased by about 40%,and the measurement accuracy of dust at low concentration and small particle size is effectively improved.
作者
刘丹丹
韩东志
李德文
王杰
景明明
LIU Dan-dan;HAN Dong-zhi;LI De-wen;WANG Jie;JING Ming-ming(College of Electrical&Control Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;China Coal Technology Engineering Group Chongqing Research Institute,Chongqing 400037,China)
出处
《仪表技术与传感器》
CSCD
北大核心
2020年第6期24-27,32,共5页
Instrument Technique and Sensor
基金
国家重点研发计划公共安全风险防控与应急技术装备重点专项项目(2017YFC0805200)。
关键词
粉尘测量
卡门涡街
CFD仿真
气固两相流
静电感应
dust measurement
Carmen vortex street
CFD simulation
gas-solid two-phase flow
electrostatic induction
