Turbulence Generated in Active Grid Mode Using a Multi-Fan Wind Tunnel
Turbulence Generated in Active Grid Mode Using a Multi-Fan Wind Tunnel
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DOI：
10.1299/jfst.2.643
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发表时间：
2007
影响因子：
0.8
通讯作者：
S. Ozono;H. Miyagi;K. Wada
中科院分区：
文献类型：
--
作者：
S. Ozono;H. Miyagi;K. Wada
所使用的风洞配备了一系列小型风扇（9列×11行），每个风扇都通过个人计算机独立控制。为了建立用于产生高雷诺数各向同性湍流的有效驱动模式，尝试了一种新的驱动模式（“主动网格模式”），其中主动和非主动风扇被网格状布置。研究了两种外部脉动信号的湍流特性。提出了主动网格模式产生的湍流的流动结构。
The wind tunnel used is equipped with an array of small fans (9 columns×11 rows), each of which is independently controlled via a personal computer. To establish an efficient driving mode for generating high-Reynolds number isotropic turbulence, a new driving mode (“active grid mode”) is attempted where the active and inactive fans are grid-like arranged. The characteristics of turbulence are investigated for two kinds of external fluctuated signals. The flow structure of the turbulence generated by the active grid mode is proposed.