摘要
煤粉颗粒在输送、燃烧过程中,粉体流速是监测和控制的关键参数。以环形电极作为传感器的敏感元件,采用有限元法和静电法针对固体颗粒的空间位置、轴向速度以及径向速度进行研究。根据静电感应原理,建立单个点电荷与环形电极间的数学模型,用Ansoft仿真软件测量电极上的感应信号,对电极上采集到的电荷量采用双高斯进行仿真分析,进一步对环形静电传感器上的感应信号进行相应的动态灵敏度分析,实验结果表明,颗粒的运动速度主要取决于径向运动的速度,轴向速度的影响较小,以此给两相流中煤粉颗粒的研究提供了理论基础。
In the process of conveying and combustion of pulverized coal particles,the velocity of powder is the key parameter of monitoring and control.In this paper,the circular electrode is used as the sensing element of the sensor,and the finite element method and electrostatic method are used to study the spatial position,axial velocity and radial velocity of solid particles.According to the principle of electrostatic induction,the mathematical model between the single point charge and the ring electrode is established,the induction signal on the electrode is measured by Ansoft simulation software,and the amount of charge collected on the electrode is simulated and analyzed by double Gauss,and the corresponding dynamic sensitivity analysis of the induction signal on the ring electrostatic sensor is further carried out.The experimental results show that the movement speed of particles is mainly taken as Due to the radial velocity,the axial velocity has little influence on the two-phase flow,which provides a theoretical basis for the study of pulverized coal particles.
作者
邓芳芳
Deng Fangfang(Lvliang Vocational Technical Institute,Lvliang 032300,China)
出处
《国外电子测量技术》
2020年第5期39-43,共5页
Foreign Electronic Measurement Technology
关键词
静电传感器
空间灵敏度
速度
有限元法
相关系数
electrostatic sensor
spatial sensitivity
velocity
finite element method
correlation coefficient
