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Rotational flow blade of combustion chamber of ground gas turbine

A technology of swirling blades and combustion chambers, applied in the field of gas turbines, can solve the problems of reducing resistance, reducing low-pressure areas, enhancing airflow and fuel mixing, etc., to achieve the effects of reducing low-pressure areas, reducing flow resistance, and enhancing turbulence

Inactive Publication Date: 2016-06-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the above-mentioned technical problems through the following technical means: a swirl blade of a ground gas turbine combustion chamber, the cross section of the swirl blade is an airfoil with a large head and a sharp tail, and the surface of the blade on the windward side adopts dents The structure, the dents promote the turbulent transition, and the turbulent boundary layer is not easy to flow separation, so that the low-pressure area behind the blade is reduced, reducing resistance and strengthening the mixing of airflow and fuel

Method used

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  • Rotational flow blade of combustion chamber of ground gas turbine
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  • Rotational flow blade of combustion chamber of ground gas turbine

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment the present invention will be described in further detail:

[0021] like figure 2 As shown, the swirl blade of a ground gas turbine combustion chamber in this embodiment, the cross section of the swirl blade 2 of the present invention is a kind of airfoil, and the surface of the windward side has a layer of covering layer, and the covering layer has a large number of The outline defined by a large number of members of the lattice is a circular groove 9, and the bosses located therein are correspondingly circular 8, and the thickness of the covering layer on the surface of the swirl vane is between 0.2-0.3 mm.

[0022] like image 3 As shown, it is a front view of the convex surface of the blade of the present invention. The diameter of the circular groove 9 of the lattice member is 0.8 mm, and the depth is 0.1 to 0.2 mm. The diameter is 0.3 mm, the height of the bosses is 0.08-0.12 mm, and the distance bet...

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Abstract

The invention provides a rotational flow blade of a combustion chamber of a ground gas turbine. The rotational flow blade is mainly used in a head main-combustion-level whirlcone of the combustion chamber of the ground gas turbine. The cross section of the rotational flow blade is in a wing shape, a groove and boss structure is adopted in the blade surface on the windward face, and turbulent transition is promoted to occur in advance. A flow separation phenomenon is not likely to happen to a turbulent boundary layer, and therefore a low-pressure area on the back of the blade is reduced, and resistance is reduced. Meanwhile, the turbulence intensity is increased, the premixing evenness of fuel in the main whirlcone can be improved, the combustion evenness of a main combustion area in the combustion chamber is effectively improved, a local high temperature area is avoided, and the emission of NOx is greatly reduced.

Description

technical field [0001] The invention relates to the field of gas turbines, in particular to a swirl vane for a combustion chamber of a ground gas turbine. Background technique [0002] The gas turbine is the crystallization of modern industrial achievements. The combustion chamber is an important part of the gas turbine. The main function of the combustion chamber is to convert the chemical energy of the fuel into heat energy. With the development of ground gas turbine technology, modern ground gas turbines are pursuing ultra-low pollution emissions, and at the same time, they are developing in the direction of high temperature rise. The improvement of the overall performance of gas turbines puts forward higher requirements for the design of the main combustion chamber. [0003] figure 1 It is a structural schematic diagram of an existing general dry-type low-nitrogen oxide emission combustion chamber. The combustion cylinder is located in the combustion chamber. The 8 mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/14
CPCF23R3/14
Inventor 张群邢力程云鹏汪玉明杨省喆黎超超
Owner NORTHWESTERN POLYTECHNICAL UNIV
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