Gas turbine combustion chamber with pre-mixing low-swirl nozzle

A gas turbine and combustor technology, applied in the direction of combustors, continuous combustion chambers, combustion methods, etc., can solve the problems of increased nitrogen oxide emissions, and achieve the effects of reducing the formation of NOx, lowering the combustion temperature, and lowering the temperature

Pending Publication Date: 2017-08-04
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0004] According to the technical problems raised above, a gas turbine combustor with a premixed low-swirl nozzle is provided, which is used to solve the existing swirl combustion. There is a strong recirculation zone in the swirl, and the temperature of the combustion zone is relatively high, so that nitrogen Disadvantages of increased oxide emissions

Method used

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  • Gas turbine combustion chamber with pre-mixing low-swirl nozzle
  • Gas turbine combustion chamber with pre-mixing low-swirl nozzle
  • Gas turbine combustion chamber with pre-mixing low-swirl nozzle

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Embodiment Construction

[0023] Such as Figure 1 to Figure 11 As shown, a gas turbine combustor of a premixed low-swirl nozzle includes a combustor casing and a combustion cylinder arranged in the combustion chamber casing, and an air intake cavity is formed between the combustion chamber casing and the combustion cylinder; the air intake cavity The front end is closed, and the rear end has an air inlet 1; the combustion tube is divided into a swirl area with a swirler 4 inside, a jet part with a jet hole 2 processed on the head, and a barrel part from front to back; The barrel part is the rear mixing zone with the mixing hole 5 processed on the outer wall and the front main combustion zone with the cooling hole 6 processed on the outer wall, the main combustion zone is close to the side of the jet part; the diameter of the swirl zone is less than The diameter of the cylinder part, the jet part and the swirl area and the cylinder part are in an oblique transition; an annular fuel pipe is arranged bet...

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Abstract

The invention discloses a gas turbine combustion chamber with a pre-mixing low-swirl nozzle. The gas turbine combustion chamber comprises a combustion chamber shell and a combustion barrel arranged in the combustion chamber shell, and an air inlet cavity is formed between the combustion chamber shell and the combustion barrel; the front end of the air inlet cavity is closed, and the rear end of the air inlet cavity is provided with an air inlet; a swirl area internally provided with a swirler, an injection part with the head provided with injection holes and a barrel body part are sequentially arranged in the combustion barrel from front to back; and the barrel body part is divided into a rear mixing area with the outer wall provided with mixing holes and a front main combustion area with the outer wall provided with cooling holes, and the main combustion area is close to one side of the injection part. According to the gas turbine combustion chamber with the pre-mixing low-swirl nozzle, stable and clean combustion can be achieved, the temperature of the combustion chamber is lowered, and the combustion chamber is lowered; meanwhile, the number of strong backflow areas is reduced, the retaining time of combustion products at high-temperature areas is shortened, and thus forming of thermal NOx is reduced, and NOx emission is reduced; and the structure of the combustion chamber is simplified, and primary and secondary air injection holes are decreased.

Description

technical field [0001] The invention relates to a combustion chamber of a gas turbine suitable for a premixed low-swirl nozzle. Background technique [0002] At present, swirling combustion is a common method for gas turbines to achieve stable combustion. Radial or tangential blades achieve airflow rotation and form a recirculation zone downstream of the nozzle to achieve stable combustion. [0003] However, due to the existence of a strong recirculation zone in the swirl, the temperature of the combustion zone is higher, which increases the emission of nitrogen oxides. Contents of the invention [0004] According to the technical problems raised above, a gas turbine combustor with a premixed low-swirl nozzle is provided, which is used to solve the existing swirl combustion. There is a strong recirculation zone in the swirl, and the temperature of the combustion zone is relatively high, so that nitrogen The disadvantage of increased oxide emissions. The technical means a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28F23R3/38F23R3/58
CPCF23R3/286F23R3/38F23R3/58
Inventor 邓洋波郑落汉张伟华
Owner DALIAN MARITIME UNIVERSITY
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