A siphon type outlet channel with excellent hydraulic performance and its application method

Abstract

The invention discloses a siphoning type water outlet runner with excellent hydraulic property and an application method thereof, and belongs to the technical field of a hydraulic engineering pump station. The siphoning type water outlet runner comprises an inlet section, a linear section, a hump section and a descent section. A runner vertical view (including cross hatch), a plane expanded view (including cross hatch) and a section data table are provided; based on the thought of converting runner distribution size and cross section with different conversion ratios, the distribution size and section size of the siphoning type water outlet runner provided by the invention are properly respectively converted to obtain siphoning type water outlet runners suitable for large pump stations with different flows, lifts and water outlet pond level amplitudes. The water flow of the converted runner is ordered in steering, even in diffusion, small in water loss, excellent in hydraulic property, wide in application range and convenient for use. The design quality of the siphoning type water outlet runner can be guaranteed, and a great significance is provided for guaranteeing the safe, stable and efficient running of middle and large pump stations.

Description

technical field [0001] The invention belongs to the technical field of hydraulic engineering pumping stations, and specifically relates to a siphon type water outlet channel with excellent hydraulic performance and an application method thereof. The quality of the design of the siphon outlet channel for medium-sized vertical pumping stations. Background technique [0002] Large and medium-sized vertical low-lift pumping stations are widely used in my country. The siphon outlet channel is the most commonly used outlet channel for vertical low-lift pumping stations. Its function is to guide the water flow from the outlet of the pump guide vane body to the outlet pool. In order to reduce the head loss of the outlet channel as much as possible and recover the flow energy of the water, orderly diversion and diffusion in the process. Designing a siphon outlet channel with excellent hydraulic performance is a necessary condition to ensure the safe, stable and efficient operation of...

AI Technical Summary

Problems solved by technology

The three-dimensional shape of the siphon outlet channel is complex. The traditional hydraulic design method adopts the "average velocity method" based on the one-dimensional theory, which is very different from the actual three-dimensional turbulent flow in the channel. The designed siphon outlet channel cannot guide the water flow effectively. Sequential turning and diffusion, and may cause vortices, resulting in unstable water flow in the flow channel and large head loss, which seriously affects the safe, stable and efficient operation of the pumping station

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