中文摘要：

在冷态鼓泡流化床实验台上，针对不同流化数、静床高及床料颗粒粒径下测得的风帽压力波动信号，采用小波模极大值法获取信号的小波局部极大模线，分析了流化数、静床高及床料颗粒粒径对鼓泡流化床风帽压力波动信号奇异性的影响．结果表明：风帽压力波动信号的局部奇异性随着流化数的减小、静床高的增加和床料颗粒粒径的增大而有所增强，说明通过小波局部极大模线可以对风帽压力波动信号的局部奇异性进行描述，并且能够反映鼓泡流化床流化数、静床高和床料颗粒粒径变化时床内气固流动状态的变化．

英文摘要：

Modulus maxima lines of pressure fluctuation signals measured from the wind cap in a cold bubb- ling fluidized bed setup were calculated using wavelet modulus maxima method under conditions of differ- ent fluid.ization numbers, static bed heights and bed material particle sizes, so as to analyze the influence of above factors on the singularities of corresponding pressure fluctuation signals. Experimental results show that the local singularities of pressure fluctuation signals increase with decreasing fluidization number, ris- ing static bed height and increasing bed material particle size, indicating that the wavelet modulus maxima lines can be used to describe the local singularities of pressure fluctuation signals, and to reflect the gas- solid fluidization conditions in bubbling fluidized beds at different fluidization numbers, static bed heights and bed material particle sizes.