Active Turbulence Generation in a Laboratory Wind Tunnel
Active Turbulence Generation in a Laboratory Wind Tunnel
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实验室风洞中的主动湍流生成
DOI：
10.1007/978-3-642-84399-0_54
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发表时间：
1991
影响因子：
4.6
通讯作者：
K. Sassa
中科院分区：
文献类型：
--
作者：
H. Makita;K. Sassa
设计了一种新型的有源湍流发生器。在实验室风洞中，它可以诱导出强的、均匀的、准各向同性的湍流，并具有较高的湍流雷诺数。由此产生的湍流强度超过30%，积分尺度超过200毫米，正好位于发电机下游。最大湍流雷诺数达到Reλ≈600时，比相同网格雷诺数Re M的网格湍流的雷诺数大一个数量级。强湍流的能量谱有一个明显的惯性子区，波数超过两个数量级。谱特征与Re M≈106中的网格湍流特征具有良好的可比性
A new type of active turbulence generator was designed. It can induce strong, homogeneous, and quasi-isotropic turbulence with a high turbulence Reynolds number in a laboratory wind tunnel. The resultant turbulence had intensity of more than 30% and an integral scale exceeding 200 mm just downstream of the generator. The maximum turbulence Reynolds number reached Re λ ≈ 600, which is about one order of magnitude larger than that of the grid turbulence with the same mesh Reynolds number, Re M. The energy spectrum of the strong turbulence had a clear inertial subrange spreading for more than two orders of magnitude in wave-number. The features of the spectrum are favorably comparable with those for the grid turbulence of Re M≈ 106