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Method for correcting collision probability of fish-friendly axial flow pump and fish

A friendly, axial-flow pump technology, applied in probabilistic CAD, special data processing applications, geometric CAD, etc., can solve undiscovered problems and achieve accurate evaluation results

Pending Publication Date: 2021-07-23
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After searching, no documents and patents identical to the method for correcting the collision probability between a fish-friendly axial flow pump and fish proposed by the present invention have been found.

Method used

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  • Method for correcting collision probability of fish-friendly axial flow pump and fish
  • Method for correcting collision probability of fish-friendly axial flow pump and fish
  • Method for correcting collision probability of fish-friendly axial flow pump and fish

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Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] The traditional blade impingement model is:

[0034]

[0035]

[0036] where x b is the pitch of a single blade, m;

[0037] x f is the length of the area not hit by the blade within a single blade pitch, m;

[0038] Q is the flow rate, m3 / s; A1 is the cross-sectional area of ​​the blade inlet flow, m2;

[0039] The revised blade impact model added the impact between the fish bod...

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Abstract

The invention discloses a method for correcting the collision probability of a fish-friendly axial flow pump and fishes, and relates to the field of fluid machinery. Collision of a fish body and the back of a blade is combined with a traditional blade collision model to obtain a corrected blade collision model; specifically, firstly, the impact of the blade back on a fish body is quantified to obtain the impact probability Pth back of the fish body and the blade back, and then the traditional blade impact models Pth and Pth back are summed to obtain a corrected blade impact model Pth repair. According to the correction method disclosed by the invention, the traditional blade impact probability model is corrected, so that guidance on the design of the fish-friendly axial flow pump can be realized.

Description

technical field [0001] The invention relates to the technical field of hydraulic machinery design, in particular to a method for correcting the collision probability between a fish-friendly axial flow pump and fish. Background technique [0002] At present, fish-friendly axial flow pumps with large flow and low head are widely used in pumping stations in my country. When fish pass through the axial flow pump, they will suffer from mechanical damage, damage caused by pressure fluctuations and damage caused by fluid shear force, and the damage to fish through the axial flow pump not only affects the water environment, but also protects endangered aquatic animals. presented a formidable challenge. [0003] The traditional theory of mechanical damage believes that the impact of the leading edge of the blade is the main factor causing fish damage and death. However, the impact between the fish body and the back of the blade is also a factor that cannot be ignored. Therefore, how...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F111/08
CPCG06F30/17G06F2111/08
Inventor 张帆祝路峰袁寿其张金凤陈轲石小涛
Owner JIANGSU UNIV
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