The results of an experimental investigation of the conditions of flow turbulence suppression with a set of screens, each of which operates in the optimum regime, are presented. Recommendations are made concerning the choice of the number of screens in the set, their geometric parameters and their location in the flow which guarantee the most efficient reduction of free-stream turbulence.
The results of an experimental investigation of the effect of flow contraction in the convergent nozzle of a subsonic wind tunnel on the level of turbulence are reported. The method of conducting the experiments and analyzing the data, which makes it possible to eliminate the effect of secondary factors on the results, is explained.
