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大气科学  2005 

大气边界层剪切湍流统计特性的风洞实验及其层次相似律

DOI: 10.3878/j.issn.1006-9895.2005.04.08

Keywords: 标度律,层次结构,子波变换,大气边界层,风洞

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Abstract:

对风洞模拟的大气边界层的剪切湍流场的速度脉动时间序列信号以及某一高度位置上的小波变换分解重构的信号进行了系统的统计分析.结果表明,在非均匀下垫面大气边界层的不同垂直高度上的信号,She-Leveque湍流层次相似律都成立,层次相似指数β和最高激发态的奇异标度指数γ随垂直高度的变化而变化,并给出不同尺度的分解重构信号的一些层次结构特点.

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