An air-entrained ridge layout structure suitable for high head flood discharge tunnels

Abstract

The invention discloses an aerated flip bucket arrangement structure suitable for a high water head flood discharge hole. An aerated flip bucket is arranged behind a flood discharge hole current control gate by 1-2 times of the hole diameter of the flood discharge hole; and the two sides of an opening of the aerated flip bucket are outwards expanded suddenly to increase the through-flow section of the flood discharge hole. A gate-bucket split type aeration technical scheme, provided by the invention, can thoroughly eliminate a clear water area behind the aerated flip bucket, so that an aerated cavity is not influenced by the openness of the gate any more; and no matter the opening mode of the gate, the flowing state of water current is clear and stable, so that the cavitation resistance of the arched gate is largely improved, and the operation flexibility of the gate is largely improved.

Description

technical field [0001] The invention relates to the technical field of protection of the overflow wall surface of a flood discharge tunnel of a water conservancy project, in particular to an aerated ridge layout structure suitable for the cavitation and erosion protection of the overflow wall surface of a flood discharge tunnel with a high water head. Background technique [0002] For high-head flood discharge tunnels, gates are generally adopted in the flood discharge tunnels to change the water flow in the flood discharge tunnels from pressurized flow to open flow, and the gates are usually arc gates. When the water flows through the arc gate to the pressure outlet of the flood discharge tunnel, the flow velocity is already very high, but before and after the water flow changes from pressurized flow to open flow, the flow conditions of the overflow wall of the flood discharge tunnel are completely different. Before the water flow changes from pressurized flow to open flow,...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art of setting the aerated sill next to the gate of the flood discharge tunnel, the purpose of the present invention is to provide an arrangement structure of the aerated sill that separates the gate of the flood discharge tunnel from the aerated sill, so as to solve the existing problems. In the technology, there are problems such as poor aeration effect of the water flow and effective protection of the open flow wall surface of the flood discharge tunnel when the aeration sill is installed immediately after the flood discharge tunnel gate.

Images