Control of boundary layer on rotation axysimmertic diffuser wall

The results of experimental and analytical research of a boundary layer on walls of the rotating axisymmetric diffuser are presented. The Vertel program developed in the environment of MATLAB is used for calculation. It is shown that diffuser swirl promotes elimination of a flow separation from its walls. In article are determined the minimum velocities of wall rotation for the organization of a continuous current in the diffuser with angle of expansion 10 degrees. The exploratory tests of a flow confirmed with method of velocity measurement according to images of particles that the axial diffusers swirl promotes elimination of flow separation on their walls and can be used for reduction of their length.