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Constructal cut-off fin structure for enhancing overall thermal performance

A technology of thermal performance and rib structure, applied in the direction of engine function, blade support components, engine components, etc., can solve the problems of missing, reducing the heat exchange area of ​​channels, etc., achieve high overall thermal performance, enhance overall thermal performance, and overall Effect of thermal performance effect improvement

Pending Publication Date: 2021-12-28
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, compared with continuous straight ribs, the lack of fins in the discontinuous area of ​​the structure reduces the heat transfer area of ​​the channel

Method used

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  • Constructal cut-off fin structure for enhancing overall thermal performance
  • Constructal cut-off fin structure for enhancing overall thermal performance
  • Constructal cut-off fin structure for enhancing overall thermal performance

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Embodiment Construction

[0034] The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention.

[0036] The pres...

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Abstract

The invention discloses a constructal cut-off fin structure for enhancing the overall thermal performance, and belongs to the technical field of heat exchange enhancement. Constructal cut-off fins are arranged in a cooling channel of a high-temperature component and evenly distributed in the length direction of the bottom wall face of the cooling channel periodically. Each period comprises eight rows of cut-off fins, the fins in the odd-numbered rows are cut-off in the airflow direction to form the cut-off fins and cut-off areas, the number of the cut-off fins and the cut-off areas in each row is gradually increased in the airflow direction, after the fins are cut off, the fin parts, located in the cut-off areas, in the odd-numbered rows horizontally move downstream in the airflow direction, and even-numbered rows in the period are formed. Compared with traditional continuous straight fins, the constructal cut-off fin structure generate transverse vortex in the cut-off areas to enable a near wall flowing structure to be changed, so that mixing of main flow and fluid on the boundary layer is enhanced, and the heat exchange performance and the overall thermal performance of the cooling channel are improved. The constructal cut-off fin structure is simple, reasonable in design and suitable for an internal cooling system and an enhanced heat exchange system of a high-temperature component.

Description

technical field [0001] The invention belongs to the technical field of enhanced heat exchange, and in particular relates to a configuration truncating rib structure for enhancing overall thermal performance. Background technique [0002] The fin structure is the main heat-enhancing technology in practical engineering applications, and is widely used in the internal cooling of gas turbine turbine blades, regenerative cooling of scramjet engines, solar air heaters, and heat sinks for microelectronic components. The rising temperature at the front inlet of the gas turbine turbine has far exceeded the temperature tolerance limit of the turbine blade material. It is imperative to develop efficient turbine blade cooling technology to reduce the blade temperature and prolong its service time. Due to the increase in flight Mach number and cruising time of hypersonic vehicles, the thermal environment that scramjets endure is very harsh. Regenerative cooling is considered to be the be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/18
CPCF01D5/187F05D2260/22141
Inventor 谢公南张国花朱睿
Owner NORTHWESTERN POLYTECHNICAL UNIV
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