Turbulence Generated in Active Grid Mode Using a Multi-Fan Wind Tunnel

Journal of Fluid Science and Technology

Shigehira OZONO¹  Hiromori MIYAGI¹  Kazuhiro WADA² 

[1] Department of Applied Physics, University of Miyazaki;Oki Software Corp.;

关键词: active turbulence generation;    multifan wind tunnel;    isotropic turbulence;    intensity;    scale;    high reynolds number;   

DOI  :  10.1299/jfst.2.643

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown