ABSTRACT
ABSTRACT: In this study the investigation of the effects of the tensile force on turbulent properties of flow downstream of a novel type active grid is described. Active grids are applied to achieve flows with high turbulence intensities in wind tunnels, nevertheless they require significant expense. Our novel active grid offers a more affordable option. It contains metal tapes-set perpendicularly to the main flow-which flutter caused by the flow, itself. The moving boundary layers create rapid changes in the flow parameters thus producing a high level decaying turbulence downstream of the grid. Previous investigations verify the applicability of the grid with respect to increased turbulent properties. However the magnitude of tension of the tapes has detectable effects on the flutter of the tapes. Based on this the characteristics of turbulence was investigated in case of different tension forces. Due to its beneficial properties a Constant Temperature Anemometry was applied.
