Design method for water inlet and outlet of turning tunnel in narrow water area connection space

By optimizing the design of water inlet and outlets in narrow waters, combined with structures such as anti-vortex beam sections and diffusion sections, the hydraulic characteristics of water inlet and outlet under the complex conditions of turning in narrow waters and tunnel spaces is solved, and the flow velocity uniformity and flow distribution are optimized, head loss is reduced, and power generation efficiency is improved.

CN120493448APending Publication Date: 2025-08-15CHINA POWER CONSRTUCTION GRP GUIYANG SURVEY & DESIGN INST CO LTD
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Patent Information

Application Number
CN202510411555.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-02
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

In narrow waters, the design of water inlet and outlet ports is difficult to meet the complex conditions of asymmetric narrow waters and tunnel space turn at the same time, resulting in water flow circulation, flow state disorder, and increased head loss, affecting the operation efficiency of the power station.

Method used

A method for connecting the inlet and outlet of the space turning tunnel in a narrow water area is designed, including anti-vortex beam section, sewage barrier section, diffusion section, rectangular tunnel section, gradient section, upper flat section, spatial turning section, inclined section and lower flat section. By reasonably arranging the position of the diversion pier head, spacing proportion, upper flat section and slope of the inclined section, the water flow connection method is optimized, to avoid unfavorable circulation, and to improve flow velocity and flow distribution uniformity.

Benefits of technology

It effectively reduces head losses, improves power generation efficiency, meets design specification requirements, reduces pumping energy consumption, and ensures uniform flow rate and flow distribution.

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Abstract

The invention discloses a design method for a water inlet and a water outlet of a turning tunnel in a narrow water area connection space, and belongs to the field of water conservancy and hydropower engineering. Water inlets and outlets are reasonably arranged, the design of the space turning tunnel, the connection mode of the water inlets and the water outlets and the synergistic effect of multiple parameters are achieved, namely the reasonable distribution pier head position and distance proportion, the gradient of an upper flat section and the gradient of an inclined shaft section, the space turning radius, a diffusion section bottom plate, a gate shaft bottom plate and the gradient of the upper flat section are the same. The adverse circulation of the water inlet and the water outlet is avoided, and the flow velocity and the flow distribution uniformity are improved. Finally, standard requirements are met, head loss is reduced, and the purposes of improving power generation benefits and reducing water pumping energy consumption are achieved.
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