湍流状况下的管式反应器中的速度时间序列关联维数分析

通过激光多谱勒测速仪(LDA）测得管式反应器中不同流点的速度时间序列，提出了关联维数在分析湍流场的速度时间序列的应用方法，并且得到关联维数在管式反应器中的径向和轴向的变化范围大约在1．5-2．5之间。随雷诺数Re的变化，关联维数的变化范围在1．0-2．5之间，由此可以推测关联维数为2．5有可能是湍流变化的一个临界值。提出关联维数可以用来判断涡漩的能量随时间的衰变阶数。通过使用这一方法扩展了研究湍流的思路，并且提出使用关联维数来判断湍流的可能性。

Analysis of Correlation Dimensions of Time Series in Turbulence Pipe Reactor

Velocity-arrive time series of the fluid-point in the pipe reactor was measured with LDA (Laser Doppler Anemometer). A new method of using correlation dimension was applied in this system to analyse the time series in turbulence field. By calculating the correlation dimensions of different points in pipe reactor, the range of correlation dimensions is from 1.5 to 2.5. At the same time, range of correlation dimensions with Reynold number (Re) is about from 1 to 2.5. And 2.5 is infered as the criticle value. By using this method,correlation dimension can be used to estimate the power of time when the energy of eddy attenuates. Using correlation dimension to judge status of fluid would expand the methods of turbulence study.