Combustion chamber flame tube wall adopting novel convex-wall inclined holes

A flame tube and combustion chamber technology is applied in the field of efficient cooling methods for the wall surface of the flame tube of the combustion chamber, and achieves the effects of simple structure, large flow coefficient and high cooling efficiency

Inactive Publication Date: 2019-02-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And compared with other cooling structures, this cooling hole structure improves the problem of uneven cooling effect caused by the uneven thickness of the gas film near the wall of the flame tube, and the cooling structure is simple, the cooling effect is good, and the cooling holes of the structure are not easy to block

Method used

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  • Combustion chamber flame tube wall adopting novel convex-wall inclined holes
  • Combustion chamber flame tube wall adopting novel convex-wall inclined holes
  • Combustion chamber flame tube wall adopting novel convex-wall inclined holes

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Embodiment Construction

[0018] The present invention will be further described now in conjunction with accompanying drawing:

[0019] combine figure 1 , figure 2 , The invention provides a novel cooling hole structure on the wall surface of the combustion chamber flame cylinder with a convex wall oblique hole. figure 1 is the overall picture of the wall of the combustion chamber flame tube, figure 2 is a side view of the wall of the combustion chamber flame tube, image 3 It is a cross-sectional view of the wall of the flame tube in the combustion chamber. It can be seen that the convex wall inclined hole channel and the flame tube form an acute angle protruding from the flame tube wall, and the inclination angle β of the baffle plate on the inner wall of the flame tube is the same as the angle α of the convex wall inclined hole channel. Figure 4 It is a top view of the wall of the combustion chamber flame tube.

[0020] In the traditional film cooling hole structure of the combustion chamber,...

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Abstract

The invention provides a combustion chamber flame tube wall adopting novel convex-wall inclined holes. Convex-wall inclined hole channels which obliquely penetrate through and protrude from the flametube wall are evenly distributed in the flame tube wall in the circumferential direction, the front and back adjacent convex-wall inclined hole channels are arranged in a staggered mode in the axial direction of a flame tube, and flow baffles are arranged on the inner wall of the flame tube and matched with the convex-wall inclined hole channels. Compared with existing flame tube wall structures,the combustion chamber flame tube wall has the advantages that after cooling airflow flows through the convex-wall inclined hole channels, a layer of uniform cooling air membrane which is tight in front-back connection is formed on the inner wall of the flame tube, cooling efficiency is high, the cooling airflow channels are not liable to be blocked, local overheat is not prone to being caused, and the working life of a combustion chamber is greatly prolonged. The combustion chamber flame tube wall is simple in structure and easy to process and manufacture and has great application value in practical work.

Description

technical field [0001] The invention belongs to the field of gas turbine engines, and in particular relates to a high-efficiency cooling method for the wall surface of a combustion chamber flame tube using a novel convex wall oblique hole. Background technique [0002] The highest temperature area of ​​the gas turbine is the combustion chamber, and the temperature of the gas in the main combustion area of ​​the combustion chamber can be as high as 2400K. However, the normal working temperature of the metal material of the flame tube wall does not exceed 1300K, and the material cannot withstand the harsh environment far exceeding its normal working temperature for a long time. Time works, so the combustion chamber flame tube must be cooled to prevent the flame tube from being burned out and reduce the life of the combustion chamber, thereby reducing the life of the engine. Therefore, air not used for combustion, accounting for about 60% of the total air flow, is gradually int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/42
CPCF23R3/42
Inventor 张群刘强杨福正李程镐曹婷婷张鹏王鑫海涵
Owner NORTHWESTERN POLYTECHNICAL UNIV
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