基于小波模极大值的湍动流态化流型转变特性研究  

Flow Pattern Transition Characteristic Study of Turbulent Fluidization Based on Wavelet Modulus Maxima Method

作　　者：段锋[1] 黄亚继[2] 李斌[2] 孙宇[2] 

机构地区：[1]安徽工业大学冶金与资源学院,安徽省马鞍山市243002 [2]东南大学能源与环境学院,江苏省南京市210096

出　　处：《中国电机工程学报》2011年第26期71-75,共5页Proceedings of the CSEE

基　　金：国家自然科学基金青年基金(51006023);安徽省高校优秀青年人才基金(2009SQRZ073);安徽工业大学青年教师科研项目(QZ201001)~~

摘　　要：在提升管直径为0.06 m,高度为5 m的冷态流化床试验装置上,使用基于信号奇异性检测的小波模极大值法,研究鼓泡流态化到湍动流态化的流型转变特性,获得相应的流型转变初始速度。使用压力波动平均振幅法和标准偏差法对压力波动信号进行分析,得到的转变初始速度相互之间的最大标准偏差为10.8%,说明这3种方法均能正确判断鼓泡流态化到湍动流态化的流型转变初始速度。与后两种方法相比,小波模极大值法有使用数据量少、分析速度快的优点。A fluidized bed cold model （0.06 m-I.D.x5 mhigh） was established. The study of transition velocity from bubbling fluidization to turbulent fluidization was carried out using wavelet modulus maxima method for the first time. Pressure signal was also analyzed by mean amplitude methods and standard deviation methods. Transition velocity obtained by wavelet modulus maxima method is nearly equal to the results done by the other two methods. The maxima standard deviation of each method for the other is 10.8%, which indicated that all three methods could fulfill a classification accurately. Compared with the other two methods, wavelet modulus maxima method has the virtues of small data bulk and fast analysis processing.

关 键 词：流化床 湍动 转变速度 小波模极大 压差波动 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]