| 王胜南,李敏艳.基于 ECT 的气固两相流颗粒浓度在线无损检测[J].电子测量与仪器学报,2021,35(12):52-58 |
| 基于 ECT 的气固两相流颗粒浓度在线无损检测 |
| On-line nondestructive particle concentration measurement ofgas-solid two-phase flow based on ECT |
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| DOI： |
| 中文关键词: 颗粒浓度 气固两相流 电容层析成像 在线无损检测 |
| 英文关键词:particle concentration gas-solid two-phase flow electrical capacitance tomography on-line nondestructive measurement |
| 基金项目:国家自然科学基金（51906209）、扬州市自然科学基金（YZ2019078）、扬州市市校合作专项（YZ2019130）资助 |
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| 中文摘要: |
| 颗粒浓度是描述气固两相流动状态的一个重要参数。 推导了颗粒浓度与 ECT 传感器输出电容信号之间的关系,在此
基础上开展了气固两相流颗粒浓度在线无损检测研究。 在 COMSOL+MATLAB 环境下进行气固两相流颗粒浓度测量模拟实验,
定量评估了图像法和电容法颗粒浓度测量精度。 在循环湍动流化床冷模装置上进行了初步的颗粒浓度测量实验研究,实验结
果显示,在 200、300 和 400 mm 床层测量高度处利用图像法测得的颗粒体积浓度值分别在 0. 26 ~ 0. 75、0. 09 ~ 0. 33、0. 04 ~ 0. 31
范围内上下波动,而电容法的颗粒体积浓度测量值波动范围为 0. 27~ 0. 68、0. 09~ 0. 47、0. 04~ 0. 26。 |
| 英文摘要: |
| Particle concentration is an important parameter describing the flow state of gas-solid two-phase flow. In this paper, the
relationship between the particle concentration and the output capacitance signals of the ECT sensor is derived, and the on-line
nondestructive particle concentration measurement approach is studied to detect the two-phase flow. The simulation experiment of particle
concentration measurement is performed using COMSOL and MATLAB, by which the accuracies of the image-based and capacitancebased particle concentration measurement approaches are quantitatively evaluated. A preliminary experimental study on particle
concentration measurement of gas-solid two-phase flow is carried out in a circulating turbulent fluidized bed, and the experimental results
show that the image-based particle volume concentration measured at the bed height of 200, 300 and 400 mm fluctuates in the range of
0. 26~ 0. 75, 0. 09~ 0. 33, 0. 04~ 0. 31, respectively, while the particle volume concentration measured by capacitance-based method is
in the range of 0. 27~ 0. 68, 0. 09~ 0. 47, 0. 04~ 0. 26, respectively. |
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