Spillway tunnel vent hole and tunnel top surplus amplitude combined optimization design method

A design method and joint optimization technology, applied in climate change adaptation, computing, instruments, etc., can solve problems such as large negative pressure

Active Publication Date: 2019-09-03
HUANENG LANCANG RIVER HYDROPOWER +2
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Problems solved by technology

In fact, there is a mutual balance and mutual matching relationship between the remaining space on the roof of the flood discharge tunnel and the size of the vent hole. The greater the pressure, the greater the negative pressure in the spillway, but in the past engineering design, people paid less attention to this issue

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  • Spillway tunnel vent hole and tunnel top surplus amplitude combined optimization design method
  • Spillway tunnel vent hole and tunnel top surplus amplitude combined optimization design method
  • Spillway tunnel vent hole and tunnel top surplus amplitude combined optimization design method

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[0070] The present invention will be further described in detail below in conjunction with the examples.

[0071] Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The materials or equipment used are not indicated by the manufacturer, and they are all conventional products that can be obtained through purchase.

[0072] In the present invention, the water-air two-phase flow in the open flow section of the flood discharge tunnel is regarded as stratified flow, and the negative pressure in the flood discharge tunnel is taken as the main control index. Based on the changing law of negative pressure, a new method for the join...

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Abstract

The invention relates to a spillway tunnel vent hole and tunnel top surplus amplitude combined optimization design method, and belongs to the technical field of spillway tunnel structure optimizationdesign. The method comprises the steps of based on the mass conservation and momentum conservation of water flow and air flow in the flood discharge tunnel, solving the air pressure and the air speedin the flood discharge tunnel; taking the air pressure in the tunnel top residual amplitude space as a main optimization index, obtaining a residual amplitude-air pressure curve by changing the tunneltop residual amplitude to perform multiple times of calculation, obtaining a residual amplitude-air pressure curve cluster by changing the area of a vent hole to perform multiple times of calculation, and providing a vent hole and tunnel top residual amplitude combined optimization design method based on the residual amplitude-air pressure curve cluster. According to the method, firstly, a basiscan be provided for the reasonable arrangement of the tunnel top surplus width area, namely the reasonable design of the size of the flood discharge tunnel body, the optimal matching of the vent holearea to the tunnel top surplus width space is achieved, the engineering construction cost can be greatly reduced while the negative pressure in the tunnel top surplus width space of the flood discharge tunnel is reduced, and the application and popularization are easy.

Description

technical field [0001] The invention belongs to the technical field of structural optimization design of flood discharge tunnels, and in particular relates to a combined optimization design method for ventilation holes and roof margins of flood discharge tunnels, which can be used to guide the rational arrangement of the sizes of ventilation holes and flood discharge tunnels in the design of flood discharge tunnels, and avoid waste of engineering resources. waste while ensuring the rationality of the design. Background technique [0002] The flood discharge tunnel is a flood discharge engineering facility often used in high dam flood discharge projects. The high-speed water flow in the open flow flood discharge tunnel will drag the air in the remaining space of the cave roof. Except for a small amount of air mixed into the water body, most of the air will be discharged out of the cave with the water flow. Therefore, it is necessary to set up an air supply tunnel to connect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20Y02E10/20
Inventor 马洪琪练继建王孝群庞博慧齐春风
Owner HUANENG LANCANG RIVER HYDROPOWER
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