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Structure and method for improving thermal stratification phenomenon in branch-shaped channel

A channel and branch technology, applied in the direction of pipe elements, branch pipelines, mechanical equipment, etc., can solve the problems of large pressure drop loss and disadvantage, and achieve the effects of reducing thermal stress, accelerating mixing, and reducing impact

Active Publication Date: 2021-06-11
XI AN JIAOTONG UNIV
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Problems solved by technology

However, due to the addition of porous media in the channel, the pressure drop loss will be large after the fluid flows through the porous media, which is unfavorable for fluid transportation that is sensitive to pressure drop

Method used

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  • Structure and method for improving thermal stratification phenomenon in branch-shaped channel
  • Structure and method for improving thermal stratification phenomenon in branch-shaped channel
  • Structure and method for improving thermal stratification phenomenon in branch-shaped channel

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Embodiment Construction

[0027] The present invention is described in detail below in conjunction with accompanying drawing and embodiment, and following embodiment is used to illustrate the present invention, but not in order to limit the scope of the present invention:

[0028] Three views of a radial and vertical structure provided by the present invention to improve thermal stratification can be found in Picture 1-1 , Figure 1-2 , Figure 1-3 . The radial direction of the structure is perpendicular to the axis of the main pipe 1, and it is arranged at the intersection of cold and hot fluids in the mixing zone of the branch channel. Both ends of the fixing piece 3 are radially and vertically connected to the pipe wall in the mixing zone. The three-view view of a structure with axial parallel arrangement to improve thermal stratification provided by the present invention can be found in diagram 2-1 , Figure 2-2 , Figure 2-3. The axial direction of the structure is parallel to the axis of ...

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Abstract

The invention discloses a structure for improving a thermal stratification phenomenon in a branch-shaped channel. The branch-shaped channel is formed by connecting two pipelines in a penetrating manner; cold and hot fluids are mixed in the branch-shaped channel; the structure is composed of a fixed piece, a rotating shaft and an outer side disturbance structure, and the structure is arranged in a branch-shaped channel mixing area in a radial vertical or axial parallel manner; and the fixed piece is connected to the pipe wall of the mixing area in the branch-shaped channel, and the rotating shaft with the outer side disturbance structure is rotatably connected with the fixed piece. The invention further discloses a method for improving the thermal stratification phenomenon in the branch-shaped channel, fluid impacts the outer side disturbance structure to enable the outer side disturbance structure to rotate, a mixed flow field in the branch-shaped channel is disturbed, then impact of branch pipe fluid on a main pipe is reduced, mixing of the cold and hot fluids is accelerated, the flow field and the temperature field of the fluids are homogenized, and the thermal stratification phenomenon in the branch-shaped channel is effectively improved, so that the fatigue damage of the branch-shaped channel is inhibited.

Description

technical field [0001] The invention relates to the technical field of marine nuclear power safety and pipeline fatigue damage protection, in particular to a structure and method for improving thermal stratification in a branch channel. Background technique [0002] Branch channel is a pipeline structure widely used in the field of marine nuclear power, which is mainly used for liquid transportation, mixing and reaction. Taking the steam generator water supply pipeline in the field of marine nuclear power as an example, when the branch channel transports liquids of different temperatures, after the branch jet enters the main pipe, under the impact of the branch jet, the cold and hot fluids are mixed in the branch channel, and the hot and cold fluids are mixed in the branch channel. When the fluid mixing is incomplete, thermal stratification occurs in the branch channel, causing the flow field and temperature field in the channel to fluctuate, and then transmitted to the pipe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L41/02F16L55/045
CPCF16L41/021F16L55/045
Inventor 林梅苏博黄可欣李彤王秋旺
Owner XI AN JIAOTONG UNIV
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