泡罩塔板上差压波动信号的R/S分析  

R/S analysis of the differential-pressure signals of gas-liquid flow on bubble-cap tray plate

作　　者：陈雪莉[1] 栗冬[1] 于遵宏[1] 

机构地区：[1]华东理工大学洁净煤技术研究所,上海200237

出　　处：《计算机与应用化学》2005年第2期91-95,共5页Computers and Applied Chemistry

基　　金：国家高技术研究发展计划(863计划)(2003AA521020)

摘　　要：采用域重新标度(R/S)分析方法研究了泡罩塔板上的差压波动信号,得出泡罩塔板上差压波动信号的Hurst指数在0.33～0.49之间,<0.5说明差压波动信号具有“反持久性”。发现泡罩塔板上不同操作条件下,差压波动信号分形维数变化范围为1.51～1.67,且不同气液两相流型分形维数D存在差异:喷溅流型1.50<D<1.54;混合泡沫流型1.60<D<1.68;乳沫流型1.55<D<1.60;自由鼓泡流型1.55<D<1.68。基于此差异,提出了一种判别塔板上气液两相流型的新方法。The differential-pressure signals of gas-liquid flow on bubble-cap tray plate have been calculated with the Rescaled Range Analysis(R/S). It has been achieved that Hurst exponents of the differential-pressure signals vary from 0.33 to 0.49. The fact that the values of Hurst exponents are less than 0.5 indicates that the differential-pressure signals are anti-permanent. Meanwhile, it has been found that under different operational conditions, the fractal dimensions(D) of the differential-pressure signals range from 1.51 to 1.67; and are distinct for the different gas-liquid flow regimes : 1.50<D<1.54 for spay regime; 1.60<D<1.68 for mix-froth regime; 1.55<D<1.60 for emulsion regime; 1.55<D<1.68 for free-bubble regime. According to this fact, a new method used to distinguish the gas-liquid two-phase flow regimes on bubble-cap plate has been proposed.

关 键 词：泡罩塔 R/S分析 HURST指数 分形维数 

分 类 号：TQ02[化学工程]