Integrated diffusion oriented combustion chamber

A combustion chamber and guiding technology, applied in the direction of combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of increasing engine length and weight, complex structure, shortening length, etc., to ensure outlet temperature distribution, reduce pollution emissions, simplify The effect of matching structure

CN101650038AInactive Publication Date: 2010-02-17BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2010-02-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an integrated diffusion oriented combustion chamber which adopts a full ring combustion chamber structure. The integrated diffusion oriented combustion chamber mainly comprises a crankcase, a combustion liner and an oriented diffuser. The oriented diffuser realizes pneumatic and structural coupling, controls the tangential flow direction and carries out diffusion and speedreduction, and a local return low-speed zone is formed, thereby being good for flame linkage and tangential stable combustion; grading combustion is adopted, and a pre-combustion grade can be selected to work alone and work together with a main pre-combustion grade according to work conditions; the pre-combustion grade utilizes the trapped vortex combustion technology for stable work, goes into amain combustion zone to inflame a main combustion grade through a contraction outlet, and provides a stable ignition source for the main combustion grade; fuel of the main combustion grade is injected to a main combustion grade airflow in the oriented diffuser, atomization evaporation mixing with short distance is realized, and combustible mixture gas with uniform mixing is provided for the maincombustion zone. The invention allows tangential rotational flow of a gas compressor to directly go into the combustion chamber so as to realize tangential highly efficient and stable combustion; in addition, the discharge of pollutants is low, pre-rotation is provided for a turbine, the structure can be simplified, the weight is lightened, and the densification of a gas turbine is realized.
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Description

technical field

[0001] The invention relates to a full-ring combustor of a gas turbine adopting an integrated structure of a guider and a diffuser, which is suitable for tangential airflow conditions at the inlet and outlet of the combustion chamber, simplifies the structure of the combustion system of the gas turbine, and ensures stable and efficient combustion in a wide working range. Background technique

[0002] Judging from the aerodynamic layout of conventional gas turbine combustors, it is mainly based on axial flow. However, whether it is an axial-flow compressor or a centrifugal compressor, the outlet air flow has a strong tangential swirl component. For a conventional combustion chamber, it must be equipped with an inlet de-rotation guide, and then use the expansion In order to successfully organize the combustion and ensure the performance of the combustion chamber, the compressor must be used to diffuse the pressure and reduce the speed. If the direction of the ...

Examples

Embodiment Construction

[0029] Such as figure 1 As shown, the invention is structurally mainly composed of a casing 9, a flame tube 10, a guide diffuser 11, a pre-combustion stage fuel injector 12 and a main fuel stage fuel injector 13. The inlet airflow 1 is provided by the compressor, has a certain tangential angle, and is divided into the outer annular cavity airflow 3 , the inner annular cavity airflow 4 and the main combustion stage airflow 5 in the radial direction. The airflow 3 of the outer ring cavity is mainly the cooling of the outer flame tube and the air volume of the pre-combustion level. The air flow 4 in the inner annular cavity is the cooling air for the inner flame cylinder. The pre-combustion level airflow 6 enters the pre-combustion zone 14 to form a trapped vortex flow, which is mixed with the pre-combustion level fuel spray 8 provided by the pre-combustion level fuel injector 12 to form a mixture with an equivalence ratio of 0.6 to 2.0. Forming vortex combustion, the pre-combu...