Theoretical justification for reducing the hydraulic resistance in the confuser of the suction pipeline

The relevance of the research lies in the theoretical substantiation of the application of an improved bell (confuser) on the suction line of the pump unit of the meliorative pumping station in order to reduce hydraulic resistance compared with a cylindrical tube. The scheme of the steady nonuniform axisymmetric movement of water in a conical circular confuser is presented. The object of the research is the suction line of the pumping unit. Research Methods. The basic principles of incompressible fluid hydraulics, differential and integral calculus have been used while carrying out the research. Research results. The differential equation of the steady state nonuniform axisymmetric movement of water in the circular confusor has been calculated. As a result of its integration it has been proved that installation of the branch pipe at the head of the suction line allows one to reduce hydraulic resistance of the suction line and to increase the suction lift of the pump unit.