Variable Density Turbulence Tunnel

Present configuration and existing infrastructure:

Passive grids are mounted at the upstream end of the measurement section to generate turbulence.  Three grids can be installed with 53.3mm, 106.6mm, or 186.6mm grid spacing.  These are biplanar grids of bars with square cross section that block 40% of the cross section.  The integral scales of the flow are approximately equal to the grid spacing, and the turbulence intensities are 2-3%.

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