Vortex shedding effects in grid-generated turbulence

Experiments on grid-generated turbulence reveal that vortex shedding energy along the centerline is lower for a fractal square grid than for a single-square grid and than for a single-square grid with splitter plates. A less intense vortex shedding enhances non-Gaussian behavior of the velocity fluctuations in the production region, and reduces the rate of streamwise growth of the integral length scale in the decay region.