Journal of Fluid Science and Technology
Online ISSN : 1880-5558
ISSN-L : 1880-5558
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Turbulence Generated in Active Grid Mode Using a Multi-Fan Wind Tunnel
Shigehira OZONOHiromori MIYAGIKazuhiro WADA
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2007 Volume 2 Issue 3 Pages 643-654

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Abstract

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.

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© 2007 by The Japan Society of Mechanical Engineers
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