Abstract:

A new method called structural catastrophe analysis was applied to the analysis of pressure fluctuation time series with chaotic and fractal characteristics in gas-solids fluidized bed.In every type of fixed bed，bubbling bed，turbulent bed，fast fluidized bed and pneumatic conveying stage，pressure fluctuation signals were sampled and dynamic exponents were solved.The changes of T_mean and T_max in different types of fluidized bed were analyzed and summarized.It was concluded that T_mean and T_max can indicate different types of fluidized，and T_max can also be recognized as a new characteristic parameter in addition to correlation parameters，LE exponent and K entropy.

Key words:

流化床, 突变理论, 压力脉动, 混沌

关键词:

流化床, 突变理论, 压力脉动, 混沌