湍流标度律的实验测量
An experimental study on turbulent scaling law
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摘要: 实验测量了射流与圆柱尾流纵、横向的湍流速度脉动,计算了这两种方向的湍流速度结构函数的标度规律。结果表明,横向的湍流速度脉动比纵向有着更大的间歇性,这支持目前已有的一些关于均匀各向同性湍流的实验测量和数值计算的结果,而与另一些文献报道不同。此外,还对纵、横向湍流速度结构函数标度律的S-L模型进行了一些分析。Abstract: The scaling of the longitudinal and transverse velocity structure functions is studied experimentally for turbulent jet and cylindrical wake flow.The results support some previous researches and show that the transversal velocity fluctuations are more intermittent than the longitudinal ones.Also,the hierarchical relation in the S-L model of turbulent scaling law is ana~lyzed for the longitudinal structure functions as well as the transverse structure functions.
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