405 Turbulence generation due to unsteady shear using a multi-fan wind tunnel
Details
The purpose of the present study is to effectively produce isotropic high-Reynplds-number turbulence using a wind tunnel of multi-fan type. For the modes mainly examined, the fans are divided into two sets in a checkerboard pattern. Blowing and suction are provided to the respective sets of fans with a single sinusoidal component. The suction causes a maximum intensity at the inlet of the test section. Without phase shift, however, natural mixing is not enhanced. A relatively high turbulence Reynolds number has been achieved for a driving mode within a practically small distance.
