卡门涡街与伯努力效应组合式粉尘测量管道结构优化研究  

Study on the Structure Optimization of Dust Detection Pipeline Based on Karman Vortex Street Effect and Bernoulli Effect

作　　者：刘丹丹 单驰 代英鹏 李德文 LIU Dandan;SHAN Chi;DAI Yingpeng;LI Dewen(Heilongjiang University of Science and Technology,Harbin,Heilongjiang 150022,China;Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,黑龙江哈尔滨150022 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《矿业研究与开发》2021年第11期168-172,共5页Mining Research and Development

基　　金：国家重点研发计划项目(2017YFC0805208)。

摘　　要：针对低粉尘浓度环境下电荷感应法粉尘浓度测量精度过低的问题,基于伯努利效应和卡门涡街效应提出了一种组合型测量管道结构,在伯努利管道的效应段加入涡街体,叠加两种流体效应,增大流速以提高粉尘颗粒在环形静电感应装置处的感应电量,从而提高静电感应装置的测量精度。利用Fluent进行气固两相流模拟仿真与计算,并采用MATLAB计算不同粒径的粉尘颗粒通过环形静电感应装置处所携带电荷量。结果表明:卡门涡街与伯努利效应组合式结构的粉尘颗粒平均感应电荷量提高了26.10%,并在小粒径下感应电量结果更为明显,在粒径7.07μm以下的颗粒感应电量提高了约32.36%,改善了静电感应法在小粒径粉尘中测量精度不足的问题。In order to solve the problem of low dust detection accuracy of charge induction method in low dust concentration environment,a combined detection pipeline based on Bernoulli effect and Karman vortex street effect was proposed.Vortex street body was added in the effect section of Bernoulli pipeline,and two fluid effects were superimposed to increase the flow rate to improve the induced electricity of dust particles at the ring electrostatic induction device,so as to improve the detection accuracy of electrostatic induction device.Fluent was used to simulate and calculate the gas-solid two-phase flow,and Matlab was used to calculate the amount of charge carried by dust particles with different sizes through the ring electrostatic induction device.The results show that the average induced charge of dust particles in the combined pipeline is increased by 26.10%.And the induced charge of dust particles with small particle size is improved more obviously,which can be increased by 32.36%at the particle size less than 7.07μm.The new pipeline solves the problem of insufficient detection accuracy of electrostatic induction method in the dust with small particle size.

关 键 词：静电感应 粉尘检测 伯努利效应 卡门涡街效应 模拟仿真 

分 类 号：TD714.3[矿业工程—矿井通风与安全]