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Open channel diffusion section flow-equalizing device and method for calculating placement position of open channel diffusion section flow-equalizing device

A diffusion section and open channel technology, applied in water conservancy projects, marine engineering, artificial waterways, etc., can solve problems such as few research results

Inactive Publication Date: 2015-05-27
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, to solve the problem of smooth connection of water flow in the large diffusion section, it is necessary to start from the perspective of inhibiting the separation of the boundary layer, and study the balanced flow measures that have better hydrodynamic characteristics and can better maintain the continuity of the open channel water flow, and the research results in this area are still relatively small. few

Method used

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  • Open channel diffusion section flow-equalizing device and method for calculating placement position of open channel diffusion section flow-equalizing device
  • Open channel diffusion section flow-equalizing device and method for calculating placement position of open channel diffusion section flow-equalizing device
  • Open channel diffusion section flow-equalizing device and method for calculating placement position of open channel diffusion section flow-equalizing device

Examples

Experimental program
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Effect test

Embodiment 1

[0074] like Figures 1~8 As shown in the figure, an open channel diffusion section flow equalizing device is characterized in that it comprises: a top plate 1 in the shape of an isosceles triangle, a bottom plate 2 in a dovetail shape arranged in parallel with the top plate 1, and an outer side connecting the top plate 1. and the two water-facing front ramps 3 on the outer side of the bottom plate 2, and the water-facing rear ramps 4 that overlap with the bottom of the top plate 1 and the top angle is inclined to the plane where the bottom plate 2 is located. , the outer wall 5 of the flank connecting the rear side of the water-facing front ramp 3 and the end point of the bottom plate 2 and the inner flank connecting the waist of the water-facing rear ramp 4 and the end point of the bottom plate 2 wall 6.

[0075] The bottom plate 2 is a left-right symmetrical structure, the axis of symmetry is the center line of the bottom plate 2, and the two ends of the axis of symmetry ar...

Embodiment 2

[0115] like Figures 1~8 As shown in the figure, a diffuser section flow equalization device of an open channel, θ is 35°; the slope ratio of the water-facing front slope plate 3 is 1:10; the slope ratio of the water-facing rear slope plate 4 is 1:8; The slope ratio of the gentle slope is 1:6; when the submersion γ is 0.65, C S3 The momentum distribution of the section is balanced, and the flow distribution effect of the current equalizing device is good. The rest of the contents are the same as those in Example 1.

Embodiment 3

[0117] like Figures 1~8 As shown in the figure, an open channel diffusion section flow equalizing device is characterized in that:

[0118] Diversion angle θ: In order to avoid the separation phenomenon between the water flow and the delta wing body, the diversion angle should be such that the water flow can bypass the delta wing body as smoothly as possible. In the test, when the split angle is 25°, 30°, and 35°, the water flow bypasses the wing body relatively smoothly, and no separation occurs. It can be seen from the comparison chart of the shunting ability of the delta wing body: when the shrinkage ratio is constant, the smaller the shunting angle, the stronger the shunting ability. It can be seen from the shunt effect diagram: when the shunt angle θ = 30°, the section C S3 C V The smallest value, the most balanced momentum distribution.

[0119] Shrinkage ratio λ: The shrinkage ratio reflects the lateral interference degree of the delta wing body to the open channel...

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Abstract

The invention discloses an open channel diffusion section flow-equalizing device and a method for calculating a placement position of the open channel diffusion section flow-equalizing device. The open channel diffusion section flow-equalizing device is characterized by comprising an isosceles triangular top plate (1), a dovetailed bottom plate (2), two upstream front slope plates (3), an isosceles-triangular upstream rear slope plate (4), a flank outer wall (5) and a flank inner wall (6), wherein the dovetailed bottom plate (2) is arranged parallel to the top plate (1); the two upstream front slope plates (3) are connected with the outer lateral edge of the top plate (1) and the outer lateral face of the bottom plate (2); the isosceles-triangular upstream rear slope plate (4) is superposed with the bottom of the top plate (1); the vertex angle of the isosceles-triangular upstream rear slope plate (4) inclines to the plane of the bottom plate (2); the flank outer wall (5) is connected with the rear lateral edges of the upstream front slope plates (3) and the tail end point of the bottom plate (2); the flank inner wall (6) is connected with the waist of the upstream rear slope plate (4) and the tail end point of the bottom plate (2). According to the open channel diffusion section flow-equalizing device and the method for calculating the placement position of the open channel diffusion section flow-equalizing device, the theoretical and technical problems of short-distance diffused water-flow smooth joint are solved through the flow division effect of two flanks of the flow-equalizing device.

Description

technical field [0001] The invention relates to an open channel diffuser section current equalizing device and a calculation method for its placement position, in particular to an open channel diffuser section current equalizing device based on delta wings and using the angle of attack and guide wings to moderately divide water flow laterally and its placement The invention discloses a method for calculating the position, belonging to the technical field of water conservancy engineering. Background technique [0002] In the water delivery project, the shape and layout of the diffusion transition section of the open channel are important issues related to the safe operation of the project. Engineering practice and tests show that when the diffusion angle of the diffusion section of the open channel exceeds a certain range, boundary layer separation will occur on the side wall; the separation of the diffusion water flow from the boundary will produce strong vortex motion and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/00
CPCE02B1/00E02B5/00
Inventor 朱泽宁亚伟顾雯罗晓丽郝梦茹蔡庆拟胡涛黄小祥张志才陈喜
Owner HOHAI UNIV
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