Model studies of a curved suction pipe of pumping units

¹ Research Institute of Irrigation and Water Problems, Karasu-4 Street, Tashkent, 100187, Uzbekistan
² Tashkent Institute of Irrigation and Agricultural Mechanization Engineers, 39 Kari Niyaziy Street, Tashkent 100000, Uzbekistan
³ Jizzakh Polytechnical Institute, Jizzakh, 130100, Uzbekistan

^* Corresponding author: gazaryan.lex@gmail.com

Abstract

The purpose of the research was to study the hydraulic conditions of the flow supply in the new design of the curved suction pipe and to study the effect of these conditions on the pump operation. Improving the suction pipes provides a predetermined schedule of water supply, reducing unproductive losses and the cost of electricity for water lifting. Therefore, such studies are relevant. The article uses methods of physical modeling with the introduction of the obtained data on full-scale structures. The values of the dimensionless coefficients and the corresponding hydraulic gradients for various times are studied on a suction pipe model at Q_max and Q_min, over the entire range of operating parameters. The chosen method of improving the suction pipes provides an optimal water supply schedule, reducing unproductive losses and electricity costs for water lifting. During the reconstruction of pumping stations, projects for the modernization of water supply facilities were introduced with annual energy efficiency amounting to 1312 million sum for the pumping stations Kuyumazor, Kiziltepa-1 - 105 million sum.