空调系统送风湍流分形维数的研究

Research on the fractal dimension of air supply turbulence in air conditioning system

通过测量房间内空调送风的瞬时速度,得到各样本点速度的时间信号。利用MATLAB计算了各样本点速度时间信号的分形维数在1.60~1.73之间。通过对距离风口不同高度处的样本点速度时间信号分形维数分布的分析,得出同一高度样本点的分形维数从中间位置向两侧逐渐降低,说明样本速度的波动程度从中间向两侧逐渐趋减小。

This article measured the instantaneous speed of air supply in the room to obtain the time signal of each sample point speed. Using MATLAB to calculate the fractal dimension of the speed signal of each sample point is between 1. 60 and 1. 73. By analyzing the distribution of the fractal dimension of the speed signal of the sample points at different heights from the tuyere,we can know that the fractal dimension of the same height sample point gradually decreases from the middle position to both sides. This shows that the fluctuation of the sample speed gradually decreases from the middle to both sides.