Outer scale of turbulence: comparison of different models
Outer scale of turbulence: comparison of different models
复制标题
湍流的外部尺度：不同模型的比较
DOI：
10.1364/josaa.12.001346
复制
发表时间：
1995
影响因子：
1.9
通讯作者：
V. Voitsekhovich
中科院分区：
文献类型：
--
作者：
V. Voitsekhovich
给出了不同外尺度相关大气湍流模式的计算结果。三个外尺度模型被认为是：指数模型，冯卡门模型，和格林伍德模型。外尺度模型的推广建议。比较了不同外尺度模型下折射率结构函数、相位结构函数和时空Zernike系数特性的计算结果。在Kolmogorov湍流的情况下，得到了时间相关函数和Zernike系数谱的解析表达式。结果表明，所有考虑的模型给出几乎相同的结果。
The calculation results obtained with different outer-scale dependent atmospheric turbulence models are presented. Three outer-scale models are considered: the exponential model, the von Karman model, and the Greenwood model. A generalization of the outer-scale models is suggested. The calculation results of the refractive-index structure functions and of the structure functions of phase and spatial–temporal Zernike coefficient characteristics are compared for the cases of different outer-scale models. In the case of Kolmogorov turbulence the analytical expressions for the temporal correlation functions and spectra of the Zernike coefficients are obtained. It is shown that all considered models give nearly the same results.