大气边界层湍流积分尺度的分析方法

Methods for Analysis of Turbulence Integral Length in Atmospheric Boundary-layer

分析了大气边界层风洞中模拟湍流和实测大气湍流的积分尺度 ,通过风洞中的模拟湍流积分尺度分析 ,检验了Taylor假设的合理性 ,并比较了五种常用方法的计算结果 ,确定出合适的分析方法 ;利用自相关函数直接积分和自拟合模型 (AR模型 )的方法分析了实际大气湍流的积分尺度 ,结果证明自相关函数直接积分的方法最为简便合理 .

Integral length scales of turbulence simulated in boundary-layer wind tunnel and field measured are analyzed in this paper.The Taylor's hypothesis is verified to be reasonable through experimental analysis.The results calculated with 5 different methods are compared with each other in order to find the most suitable one.Integral length scales of atmospheric boundary-layer turbulence are obtained from field measured data with direct integration of auto-correlation function and auto-regression model (AR model) methods.The results show that the method of direct integration of auto-correlation function is the most convenient and most reasonable.