Abstract: The experimental results indicate that the screens can significantly reduce the flow turbulence intensity. In the present study, screens can generally reduce the flow turbulence intensity by as much as 50% to 70%, greatly improve its distribution in the vertical direction, and make it uniform. By analysing the experimental results, it is found that the screen with solidity σ = 0.3 can efficiently improve the waterflow, and the value agrees well with σ<0.3 suggested by other workers in wind tunnel experiments.

Key words: flow fidlds, water channel, turbulence, gauze screens