Ski-jump and jet flow combined energy dissipation device

Abstract

The invention discloses a ski-jump and jet flow combined energy dissipation device, and belongs to the technical field of dam flood discharge and energy dissipation. The ski-jump and jet flow combined energy dissipation device is composed of an impounding reservoir, a dam body, a dam surface, an impeller, a generator, a high pressure water pump and a plunge pool. The impounding reservoir, the dam body, the dam surface and the plunge pool are reduced structures of an actual overflow dam. The impeller can be fixed on an appropriate position of the dam surface according to actual requirements. The generator and the impeller are coaxial. The high pressure water pump is arranged inside the plunge pool. High-velocity water flow discharged from a dam top is utilized for impacting the impeller on the overflow dam surface, the impeller rotates to drive the generator to generate electricity and supply power for the high pressure water pump in the plunge pool. The surface-shaped jet flow sprayed upwards from the water pump and the surface-shaped water flow discharged after being flipped by the overflow dam surface collide in the air and dissipate energy. According to the ski-jump and jet flow combined energy dissipation device, a mechanical energy dissipation device is arranged on a ski-jump energy dissipation device for the first time. The ski-jump and jet flow combined energy dissipation device has the advantage of dissipating energy by a sill, nappe convection and the plunge pool, has high energy dissipation and erosion control efficiency and outstanding practical value, and is wide in application prospect.

Description

Technical field: [0001] The invention relates to a deflecting flow and jet flow combined energy dissipation device, which belongs to the technical field of dam flood discharge and energy dissipation, and can realize the purposes of bottom sill energy dissipation, hedging energy dissipation, water cushion pond energy dissipation and ecological energy storage at the same time. Background technique: [0002] In recent years, with the implementation of the country's western development and the strategy of power transmission from west to east, a number of 200-300m high dams will be built in the western alpine and valley areas. These projects generally have the characteristics of high head and large flow of flood discharge, which increases the difficulty of the layout of discharge structures, and there is a contradiction between excessive flood discharge power and small downstream energy dissipation space. In high-head water conservancy and hydropower projects, the problem of high...

AI Technical Summary

Problems solved by technology

Some dams now use scour pits to form water cushions, but this method has many defects: for example, when the anti-scour capacity of the bedrock is not ideal or there are cracks and joints that endanger the safety of the dam body near the formed scour pits, the use of scour pits will be more restricted

Images