大規模乱流場の特性の評価 : 第1報,乱流発生装置の性能について
大規模乱流場の特性の評価 : 第1報,乱流発生装置の性能について
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大尺度湍流场特性评估：第1部分，关于湍流发生器的性能
DOI：
10.1299/kikaib.53.3173
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
明由 飯田
中科院分区：
文献类型：
--
作者：
秀治 蒔田;浩司 佐々;隆夫 岩崎;明由 飯田
A new scheme for an artificial turbulence generator was developed to realize a strong turbulence field with large scale turbulent eddies in a small wind tunnel. t is a sort of mechanical grid with small agitating wings randomly oscillated by pulse motors. The resultant turbulence had turbulence intensities of more than 10 % in the region far down-stream of the generator. It showed almost completely flat distributions of the mean velocity and the turbulent intensities across the test section. The power spectra had smooth and wide spread distributions. The inertial sub-ranges were observed for more than two orders of magnitude in wave-number. Its width exceeded the values obtained for the turbulent fields with far larger Reynolds numbers of more than 106.
