Branch-shaped channel structure for inhibiting fatigue damage

A channel structure, fatigue damage technology, applied in pipeline protection, heat exchanger type, pipeline damage/wear prevention, etc., can solve fatigue damage and other problems, achieve the effect of reducing oscillation, reducing impact, and inhibiting fatigue damage

Active Publication Date: 2020-04-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem of fatigue damage caused by the intense mixing of hot and cold fluids

Method used

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  • Branch-shaped channel structure for inhibiting fatigue damage
  • Branch-shaped channel structure for inhibiting fatigue damage
  • Branch-shaped channel structure for inhibiting fatigue damage

Examples

Experimental program
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Embodiment Construction

[0020] The implementation method of the present invention will be further described below in combination with the accompanying drawings and specific embodiments of the present invention. The following examples are only used to illustrate and explain the present invention, but not to limit the scope of the present invention.

[0021] Such as figure 1 , 2 , shown in 3 and 4, a kind of branch channel structure that suppresses fatigue damage, it comprises branch channel 1, and described branch channel 1 is made of the branch structure that main pipe 2 and branch pipe 3 are connected with 90 °; The fluid flows in the main pipe 2 at 48°C, and the fluid in the branch pipe flows in the branch pipe 3 at 33°C; the fluid in the branch pipe is injected into the jet zone 4 of the branch pipe, and is mixed with the fluid in the main pipe in the fluid mixing zone 5; The branch pipe mixing area is equipped with a jet disturbance hollow cylinder 6 made of high thermal conductivity material t...

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Abstract

The invention discloses a branch-shaped channel structure for inhibiting fatigue damage, which comprises a branch-shaped structure formed by connecting two channels in an intersecting mode at any angle, two cold and hot fluids are mixed in the branch-shaped channel, and a jet flow disturbance hollow solid is installed in a branch pipe jet flow area in the branch-shaped channel and used for reducing impact of a branch pipe jet flow on the pipe wall of a main pipe; mixing disturbance hollow solids are installed in a fluid mixing area in the branch-shaped channel in an array mode and used for uniformly enhancing cold and hot fluid mixing in the mixing area; the two types of hollow solids are made of a high-thermal-conductivity material and are filled with a phase change medium; the cold fluidis heated and the hot fluid is cooled by utilizing the phase change process of the phase change medium so as to inhibit the pulsation of the temperature field; and the phase change medium is added with a high-thermal-conductivity material used for strengthening heat transfer of the phase change material, so that the pulsation phenomenon in the fluid mixing process in the branch-shaped channel isrestrained, and the problem of fatigue damage of the branch-shaped channel due to fluid mixing is solved on the basis that the flow resistance is not obviously increased.

Description

Technical field: [0001] The invention relates to the technical field of fatigue damage protection of channel pipelines, in particular to a structure and method for suppressing fatigue damage caused by mixing cold and hot fluids in a branch channel. [0002] technical background: [0003] As the energy source and power core of nuclear power plants, thermal power plants, petrochemical, HVAC and liquefied natural gas industries, power plants have extremely large and intricate piping systems, and there are a large number of branch channels for fluids of different properties to connect and mix. , reaction, etc. Most of the existing branch-shaped passages are connected by two passages intersecting at a certain angle, and their interfaces are mostly in the shape of a circle or a rectangle. The hot and cold fluids of different properties in the branch channel are violently mixed, forming obvious thermal stratification and extremely uneven velocity field, pressure field and temperatu...

Claims

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Application Information

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IPC IPC(8): F16L57/00F16L57/04F28D20/02F28D20/00F28F13/12
CPCF16L57/00F16L57/04F28D20/00F28D20/02F28D20/021F28F13/12Y02E60/14
Inventor 林梅朱子良苏博王秋旺
Owner XI AN JIAOTONG UNIV
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