Discharge - circle situated on the surface or inside an infinite impermeable cylinder
Potential liquid motion created by a discharge-circle situated in infinite space in a cylindrical coordinate system has already been investigated before. It is impossible to use such a liquid flow for solution of hydraulic engineering tasks because of the presence of water inflow to the discharge from the inner side (inner flow lines). It is possible to exclude the inflow from the theoretical solution if the discharge - circle is situated on an infinite impermeable cylinder. The article presents an analytical investigation of a potential flow of a liquid induced by discharge channel - a circle situated in infinite space on an infinite impermeable cylinder. The investigation results in an engineering solution. It is carried out using a new investigation method of potential liquid flows. This method is offered by the authors. The authors obtained the formulas required for calculation of the fields of velocities and expotential surfaces of the liquid flow created by the considered discharge. This flow may be used for solution of different tasks of hydropower and hydraulic engineering construction. In particular, in order to calculate the sizes and forms of spiral cases of turbines.