Analysis of the hydraulic conditions of the downhole spillway to possibility of the cavitation

Zimniukov Vladimir Anatolevich, Zborovskaia Marina Ilinichna, Zaitsev Anton Ivanovich

Federal state budget educational institution of higher education «Russian state agrarian university – МAА named after C.A. Timiryazev», Moscow, Russia

Abstract:

Studying the work of the deep spillway with segment gate, the presence threshold and asymmetric diffuser outlet part with the determination of possibility appearance of cavitation. As a working case is regarded a pass a high water. Identified the causes of occurrence of cavitation in the offtake spillway tract with the definition of high-speed mode, and the study of piezometric pressure in the calculated alignments, based on data obtained by the model scale 1:50 M spillway. As a result of analysis of the data revealed that under the given working conditions cavitation will occur in the presence of any potential exciter in the pressureless part of the spillway. To ensure safe operation of the spillway is necessary to change the construction of the outlet or change the characteristics of the water flow (for example, use aerators).

Keywords:

Kurpsai waterworks, deep spillway, cavitation, modeling studies, model of the deep spillway, hydraulic researches, flow velocity.