| 鼓泡流化床风帽压力信号的频谱分析 |
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| 引用本文： | 高建强,姜华伟,夏豹,陈鸿伟.鼓泡流化床风帽压力信号的频谱分析[J].动力工程,2011,31(5). |
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| 作者姓名： | 高建强 姜华伟 夏豹 陈鸿伟 |
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| 作者单位： | 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,保定,071003 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金项目(20090036110008); 华北电力大学“211工程”三期面上项目(94021001) |
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| 摘 要： | 在鼓泡流化床冷态试验台上,采集不同风帽入口的压力信号.基于Matlab软件,利用自相关函数的傅里叶变换对采集的信号进行频谱分析,得到信号主频的分布范围以及对应的功率谱密度,分析了不同静床高和不同表观气速下布风板中心、边壁风帽的压力波动特性.结果表明:风帽入口压力信号的频谱变化与静床高和表观气速的变化密切相关,且压力波动信号的主频集中在0～10 Hz的范围,可为风帽压力信号的测点布置和采样频率的设置提供参考.
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| 关 键 词： | 鼓泡流化床 气固两相流 频谱分析 风帽 压力信号 |
Frequency Spectrum Analysis on Pressure Signals of Wind Caps in a Bubbling Fluidized Bed |
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| GAO Jian-qiang
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JIANG Hua-wei
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XIA Bao
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CHEN Hong-wei.Frequency Spectrum Analysis on Pressure Signals of Wind Caps in a Bubbling Fluidized Bed[J].Power Engineering,2011,31(5). |
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| Authors: | GAO Jian-qiang JIANG Hua-wei XIA Bao CHEN Hong-wei |
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| Affiliation: | GAO Jian-qiang,JIANG Hua-wei,XIA Bao,CHEN Hong-wei(MOE's Key Lab of Condition Monitoring and Control for Power Plant Equipment,North China Electric Power University,Baoding 071003,China) |
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| Abstract: | Through an experimental setup of cold bubbling fluidized bed,pressure signals were collected at entrances of various wind caps located in different positions of air distributor,of which the frequency spectrum was analyzed based on Matlab software using Fourier transform of autocorrelation function,thus the main frequency distribution and corresponding power density spectrum were obtained,and subsequently the pressure fluctuation characteristics of wind caps respectively at center and side wall area of air d... |
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| Keywords: | bubbling fluidized bed gas-solid two-phase flow frequency spectrum analysis wind cap pressure signal |
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