Fractal discontinuous rib structure suitable for cooling interior of turbine blade

An internal cooling, turbine blade technology, applied in blade support elements, engine elements, machines/engines, etc., can solve problems such as reducing heat exchange uniformity, and achieve reduced pressure loss, high convective heat transfer performance, and uniform convection. The effect of heat transfer performance

Active Publication Date: 2021-01-05
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, due to the paired arrangement of interrupted ribs in this structure, there is no disturbance to the fluid in the middle area of ​​the inner channel, so a low heat exchange area will be formed in the middle of the channel, which reduces the uniformity of heat exchange in the channel

Method used

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  • Fractal discontinuous rib structure suitable for cooling interior of turbine blade
  • Fractal discontinuous rib structure suitable for cooling interior of turbine blade
  • Fractal discontinuous rib structure suitable for cooling interior of turbine blade

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Embodiment Construction

[0023] 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.

[0024] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the 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 limiting the invention.

[0025] The present invention provides a frac...

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Abstract

The invention discloses a fractal discontinuous rib structure suitable for cooling the interior of a turbine blade, and belongs to the technical field of cooling of high-temperature turbine blades ofgas turbines. Fractal discontinuous ribs are arranged in a cooling channel in the blade, and each fractal discontinuous rib comprises a plurality of fractal periods uniformly distributed in the lengthdirection of the bottom wall surface of the cooling channel; each fractal period is composed of four rows of discontinuous ribs, and each row of discontinuous ribs is composed of discontinuous ribs and discontinuous areas; in each fractal period, the number of the discontinuous fins and discontinuous areas of each row of discontinuous ribs is gradually increased along the airflow direction; the blocking rate of fluid can be reduced through the discontinuous ribs, and pressure loss in the channel is reduced; secondly, transverse vortexes can be generated in the discontinuous areas of the discontinuous ribs, the turbulence effect on airflow is enhanced, mixing of main flow and boundary layer fluid is enhanced, the turbulence degree of the fluid is increased, and therefore heat exchange is enhanced; and thirdly, the transverse vortexes induced by the discontinuous areas appear in the downstream areas of the ribs, so that backflow areas behind the ribs are reduced, and heat exchange is enhanced.

Description

technical field [0001] The invention belongs to the technical field of high-temperature turbine blade cooling of gas turbines, and in particular relates to a fractal discontinuous rib structure suitable for internal cooling of turbine blades. Background technique [0002] Gas turbine is a thermal power device, which is widely used in aviation propulsion, ship power, land power generation, industrial drive and distributed energy supply due to its advantages of small size, high power, high efficiency, cleanliness and good economy. It plays a vital role in the national economy and security. With the rapid development of my country's social economy, gas turbines have huge market potential. Vigorously developing the gas turbine industry not only has a significant impact on my country's basic industries and high-end manufacturing industries, but also has great significance for enhancing my country's economic strength, scientific and technological strength, national defense strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/18
CPCF01D5/187F05D2260/201F05D2260/2212F05D2260/22141
Inventor 谢公南张国花闫宏斌李书磊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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