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工程力学  2014 

平衡大气边界层自保持问题的研究

DOI: 10.6052/j.issn.1000-4750.2013.04.0376, PP. 129-135

Keywords: 计算风工程,三维风场数值模拟,平衡大气边界层,SST,k-ω,湍流模型,入流边界条件,自保持

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Abstract:

在计算风工程(CWE)中,实现大气边界层(ABL)来流边界条件的自保持是基本前提条件,然而在很多已发表的文献中这一基本要求被忽视或未得到满足。该文首先回顾了已有研究者对该问题的研究进展,基于SSTk-ω湍流模型和平衡湍流假设,推导了适用于一般风工程计算的入口来流边界条件表达式,并结合作者的工作经验给出了适用于地形尺度风场计算的湍流模型常数建议值。随后通过三维平坦场地数值模拟检验所生成风剖面的自保持特性,效果理想。最后对实际山地地形风场进行建模计算,所得结果与现场实测数据基本吻合。

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