風向変動風洞の試作とその特性(風力・水力(1),一般講演)

概要

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The possibility of reproducing the wind direction fluctuation is studied by a new type wind tunnel, which is called as a fluctuating wind direction tunnel (FWDT). The FWDT consists of eight inflow and eight outflow wind ducts with shutters, which are radiately located around the test section. By opening only one or two sets of inflow and outflow ducts, wind blows in that direction. With this FWDT, nearly 180 degree fluctuation of the wind direction is possible. Now eight shutters are operated by linear motors and they can be controlled by a computer. The best shutter opening and closing timing was studied with smaller wind speed fluctuations during the wind direction change. Based on a natural wind measurement, required capability of FWDT for the time needed in changing the wind direction was also discussed.
2008-09-04