Decay of turbulence behind a double grid of cylinders with opposite motion of the grids

The results are given of an experimental investigation into the decay of turbulence in a flow behind a double grid of cylinders with the grids moving in opposite directions. It is shown that the distribution of the turbulence parameters behind such a grid is more uniform than for other known methods of generating turbulence.Translated from Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza, No. 3, pp. 17–25, May–June, 1979.