Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 11, 2022 - September 14, 2022
The present study developed a wind tunnel with eight multi-fans and a shutter mechanism and evaluate the performance by measuring outlet velocity. The fan was always driven, and the shutter mechanism located right downstream the fan was quickly opened to rapidly accelerate the flow at the test section of the wind tunnel. As a result, we obtain unsteady flow in which the velocity change 2 m/s to 10 m/s within 0.3 seconds. We tried to generate a uniform shear flow, with the top two horizontal rows of shutters open and the bottom two shutters closed. And we obtain shear layer which has the vorticity of 6.6 s-1.
