ENERGY OF POWER SPECTRAL DENSITY FUNCTION AND WAVELET ANALYSIS OF ABSOLUTE PRESSURE FLUCTUATION MEASUREMENTS IN FLUIDIZED BEDS
ENERGY OF POWER SPECTRAL DENSITY FUNCTION AND WAVELET ANALYSIS OF ABSOLUTE PRESSURE FLUCTUATION MEASUREMENTS IN FLUIDIZED BEDS
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DOI：
10.1205/cherd.04123
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发表时间：
2005-05
影响因子：
3.9
通讯作者：
M. Shou;Lii-ping Leu
中科院分区：
文献类型：
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作者：
M. Shou;Lii-ping Leu
流化床压力波动的标准差一直是表征流化床特性的一个基准，特别是在确定过渡速度和流型时。在这项研究中，能量的功率谱密度函数（PSDF）被证明是一个新的替代工具，有效地分析压力波动。同时，小波分析对于信号的多分辨率分解、转捩速度和流型的识别具有重要意义。PSDF的归一化能量和小波分析的结果与标准差分析吻合较好。
The standard deviation of pressure fluctuations is always as a benchmark to characterize fluidized bed, especially in identifying the transition velocities and flow regimes. In this study, the energy of power spectral density function (PSDF) was proved to be a new alternative tool to effectively analyse the pressure fluctuations. Also, the wavelet analysis was significant to deal with the signals in multi-resolution decomposition and in identification of transition velocities and flow regimes. The results from the normalized energy of PSDF and wavelet analysis are in good agreement with the standard deviation analysis.