基于小波变换的鼓泡流化床压力波动特性试验研究

Test Research on Pressure Fluctuation Characteristics of Bubbing Fluidized Bed Based on Wavelet Transform

以Fourier变换结果为基础,利用小波包变换的时频双局部化特性及滤波特性,多个尺度地对鼓泡床内不同高度测点的脉动信号进行分析,得出流化床内射流区、气泡生长区及非生长区内气泡能量的变化规律。

Analysis is made on fluctuation signals inside the bubbling bed at different height level with multiple sizes by using time-frequency dual localization features and filtering characteristics during wavelet transform, which is based on the result of Fourier transform. The changing rule of bubbling energy in the jet region, the bubbling growing region and non-growing region inside the fluidized bed is thus obtained.