| 利用ECT对稀疏气固两相流动进行浓度测量 |
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| 引用本文： | 孙猛,刘石,李志宏,雷兢.利用ECT对稀疏气固两相流动进行浓度测量[J].锅炉技术,2010,41(4). |
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| 作者姓名： | 孙猛 刘石 李志宏 雷兢 |
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| 作者单位： | 1. 中国科学院工程热物理研究所,北京,100080
2. 华北电力大学电站设备状态监测与控制教育部重点实验室,北京,102206 |
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| 摘 要： | 采用电容层析成像技术直接对稀疏气力输送的固体浓度进行测量是困难的。为克服电容传感器敏感场的不均匀性对成像造成的影响,实验系统中装置了一旋流浓缩装置,传感器电极布置在浓缩器直管上,对常温下稀疏气力输送的固体浓度进行了测试研究。通过对截面积体积分数分布、平均值以及浓波动特性的分析证明这种测试方法是可行的。通过调节浓缩器顶部的抽吸风量对断面径向浓度分布及平均体积分数进行分析研究,研究结果表明少量的抽吸会对成像有益,但抽吸量太大会扰乱流场而与引入旋流浓缩装置的目的相违背。
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| 关 键 词： | 电容层析成像 浓度测量 体积浓度 旋流浓缩 |
Experimental Study on Concentration Measurement of Subtle Gas-solids Flow Using ECT |
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| SUN Meng,LIU Shi,LI Zhi-hong,LEI Jing.Experimental Study on Concentration Measurement of Subtle Gas-solids Flow Using ECT[J].Boiler Technology,2010,41(4). |
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| Authors: | SUN Meng LIU Shi LI Zhi-hong LEI Jing |
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| Affiliation: | SUN Meng1,LIU Shi2,LI Zhi-hong2,LEI Jing1 (1.Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100080,China,2.Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education,North China Electric Power University,Beijing 102206,China) |
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| Abstract: | It is difficult to measure the concentration of solids in subtle gas-solids flow directly using electrical capacitance tomography (ECT).A cyclone is employed in the experimental system where the sensors are placed in order to compensate the inhomogeneity of the sensor sensitivity.Experimental studies are carried out on the subtle mass flow measurement in a pneumatic conveying pipeline.The distribution of volume concentration in radial direction,the average volume concentration and the fluctuating characteri... |
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| Keywords: | electrical capacitance tomography concentration measurement volume concentration cyclone condensation |
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