Abstract
The article considers a hydraulic model of fluid movement (irrigation water) in the cavity of a cylindrical filter of coarse cleaning of a sprinkler machine, in particular, a longitudinally homogeneous averaged turbulent flow in the annular gap between the filter mesh and the filter housing. For a longitudinally homogeneous flow in an annular gap, the Reynolds equations do not give the desired distribution of averaged velocities. Therefore, the differential equation of equilibrium of an elementary volume of liquid is obtained and integrated in the article. A method for calculating the unknown kinematic coefficient of turbulent viscosity is proposed. Results: According to the data of the DU-200M filter, a longitudinal profile of local averaged velocities in the annular gap and a full profile in the filter cavity are constructed. Conclusions: For the hydraulic calculation of cylindrical relatively long coarse filters, a model of longitudinally homogeneous averaged turbulent motion can be used as a first approximation.
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