【摘要】 运用复杂性 C2 、涨落复杂性 Cf及 L empel- Ziv复杂性 C(n)等复杂性参数对气固流化床压力脉动信号进行分析 ,研究它们随流化床操作气速增大历经不同流型的变化趋势并将结果作了比较 ,进一步探讨了流化床流型特性的内在规律性。研究结果表明 ,在起始流化至鼓泡态转变的过程中 ,气 -固体系会进行一种所谓的“重构”现象 ,并证实了气泡的存在是影响压力脉动信号复杂性的重要因素 ,同时实验显示复杂性参数能明确地指示固定床 ,鼓泡流化及湍动流化等不同流型之间的转变过程 ,为流型识别提供了新思路。更多还原

【Abstract】 Complex C2,fluctuation complex Cf and algorithm complex C(n) have been adopted to analysis pressure fluctuation signals from a gas-solid fluidized bed. The variations of the three complexity parameters with gas velocity from the fixed bed, bubbling fluidization to turbulence fluidization were studied, then, compared in order to characterize regime behaviors. It was experimentaly demonstrated that there exists a phenomenon named "recorded" in the regime transition from the fixed bed to bubbling fluidization, the three complex parameters are believed to be a new technique for flow regime identification.更多还原