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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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气固两相流化床压力脉动的混沌特性分析
, PP. 27-32
Keywords: 流化床,气固两相流,压力脉动,混沌分析,kolmogorov熵,关联维,lyapunov指数
Abstract:
在自行搭建的冷态流化床实验台的基础上,分别利用kolmogorov熵、关联维以及lyapunov指数对气固流化床床内气泡运动的复杂性进行了混沌特性分析,从定性、定量两个方面分析了鼓泡床、节涌床、湍动床和快速流化床的流动特性。结果表明:在流化床风帽入口p0处所测得的压力信号能够传达与侧墙压力测点p1-p10相同的信息;流化床气固两相流动具有混沌特性;鼓泡床压力脉动信号的kolmogorov熵为0.11～0.15,其混沌程度最大,而节涌床、湍动床和快速流化床的kolmogorov熵分别在0.08～0.09,0.09～0.11和0.11～0.13之间,混沌特性较弱;利用kolmogorov熵、关联维以及lyapunov指数的理论方法能够很好地辨别流化床的流化状态,有助于理解流化床的流动机理。
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