| Summary: | In engineering practice, we often encounter issues related to the connection of flows. In which, in the butt places, vortex zones are observed. The article considers the problem of fluid motion in a channel with one inflow. The scientific papers devoted to the connection of flows are studied. The pressure and non-pressure movement of fluid in the channels, as well as the influence of the structural elements of the system on the hydraulic parameters of the flow, are considered. In the article, the functions describing the main parameters of the channel and inflow are constructed using the formulas of the theory of jets, which made it possible to determine the boundary lines of the vortex zone, the angle of expansion, and the inflow with a uniform connection of the flow. The results obtained show that for a uniform connection of the flow along the channel and along the lateral inflow, it is necessary to take απ ≈ 30° – 45° at χπ ≈ 0° – 2°, while the vortex boundary line is very close to the circular arc.
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