| 王睿怀,高鹤明.平面阵列电容式固体颗粒速度测量方法研究[J].电子测量与仪器学报,2020,34(5):133-139 |
| 平面阵列电容式固体颗粒速度测量方法研究 |
| Solid particle velocity measurement method based on planar array capacitive sensor |
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| DOI： |
| 中文关键词: 颗粒局部平均速度 平面阵列式电容 空间滤波效应 气固两相流 |
| 英文关键词:local average velocity of particles planar array capacitor spatial filtering effect gas-solid two-phase flow |
| 基金项目:国家自然科学基金(51406164)、内蒙古自治区高等学校科学技术研究项目(NJZY17491)资助项目 |
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| 中文摘要: |
| 颗粒流动速度是反应气固两相流动状况的重要参数,提出一种全新的基于平面阵列式电容传感器的固体颗粒速度测量
方法。 首先利用三维电磁场仿真软件 Ansoft 对传感器建模,获取其空间轴向灵敏度的基础上,对其空间滤波特性进行理论分
析,并得到了速度测量的数学关系式。 在此基础上,设计了一套基于平面阵列式电容传感器测量固体颗粒速度的系统,并在重
力输送实验装置上进行了实验验证。 实验结果表明,颗粒流动速度 1 ~ 3 m/ s 时,颗粒速度与传感器输出信号频谱宽度呈线性
关系,测量相对误差低于 9%, 测试系统重复性误差优于 11%。 |
| 英文摘要: |
| The particle flow velocity is an important parameter of gas-solid two-phase flow. This paper presents a new method for
measuring solid particle velocity based on planar array capacitive sensors. Firstly, the 3D electromagnetic field simulation software Ansoft
is used to model the sensor, and the spatial axial sensitivity is obtained. Based on the distribution of the axial sensitivity, the spatial
filtering characteristic of planar array capacitive sensors is investigated, and the mathematical expression of the velocity measurement is
derived. Then a measurement system based on planar array capacitive sensor for measuring the velocity of solid particles is designed and
experimentally evaluated on the gravity transport experimental device. The experimental results indicate that the particle velocity is linear
with the spectral width of the sensor output signal when the particle flow velocity is between 1 m/ s and 3 m/ s. The relative error of the
velocity measurement is less than 9%, and the repeatability error of the test system is within 11%. |
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