【摘要】 对４００ｍｍ的加压流化床中局部差压脉动随压力、流速的变化规律进行了讨论。从理论与实验上分析了非线性动力学中几个特征量：脉动方差、脉动的柯尔莫哥洛夫熵、脉动的分形维数等在流化床中的物理意义。在加压流化床中，随着输入能量的增加，流化床局部差压的脉动方差将增大，Ｋ熵的变化将趋于平缓，分形维数减小并趋于一个定值。更多还原

【Abstract】 The fluctuation of local differential pressure versus pressure in 400mm pressurized fluidized bed is studied.The dynamic character of gassolid in a pressurized fluidized bed consisted of the variance, the fractional dimension, and the Kolmogorov entropy, which were derived from the signals of fluctuation of local differential pressure based on nonlineardynamics, is proposed and analyzed theoretically and experimentally, It was found that the variance will increase, the changes of Kolmogorov entropy will flattened and the fractal dimension will decrease to a constant value with the increases of pressure, superficial velocity or the energy input to the fluidized bed.更多还原