Distributed-flame combustion chamber head structure

Abstract

The invention relates to the technical field of gas turbine combustion chambers, and discloses a distributed-flame combustion chamber head structure. The distributed-flame combustion chamber head structure comprises a main spray nozzle, a central on-duty spray nozzle, a combustion chamber outer wall and a combustion end plate, wherein the main spray nozzle comprises a plurality of main combustion pipes; the combustion end plate is fixed at the back end of the combustion chamber outer wall; the central on-duty spray nozzle is arranged in the center of the combustion end plate; the main combustion pipes pass through the combustion end plate, extend into the combustion chamber outer wall, and are arranged around the outer side of the central on-duty spray nozzle; at least one radial combustion pipe is arranged on a part, which extends into the combustion chamber outer wall, of each main combustion pipe; the radial combustion pipes are positioned on the upstream of the front end of the central on-duty spray nozzle; each radial combustion pipe is provided with a main fuel spray nozzle; the combustion end plate is provided with a plurality of main air inlets. Distributed flame is established, so that defects caused by non-uniform heat release are overcome, and the generation rate of nitrogen oxides is restrained.

Description

technical field [0001] The invention relates to the technical field of gas turbine combustors, in particular to a combustor head structure with distributed flames. Background technique [0002] The combustor is one of the three core components of an industrial gas turbine, which directly determines whether the pollutants of the gas turbine meet the mandatory requirements of environmental protection regulations. Industrial heavy-duty gas turbine combustors have a variety of combustion organization forms, the core of which is to fully combust fuel and air in a proper way under many limiting factors. The limiting factors mentioned here mainly include the pressure drop through the combustion chamber, the metal wall temperature of the combustion chamber, the temperature distribution of the combustion chamber outlet, and the vibration of the combustion chamber. As far as the mainstream combustion chamber in modern industrial heavy-duty gas turbines is concerned, the combustion ba...

AI Technical Summary

Problems solved by technology

As a result, the heat release of various parts inside the combustion chamber is uneven, so there are the following problems:

[0003] (1) The influence of hot spot changes on the cooling of the flame tube brought about by the uneven heat release process. The cooling design of the combustion chamber needs to consider the cooling arrangement of all hot spots, which increases the cooling consumption and is not conducive to the improvement of the combustion chamber level;

[0004] (2) Uneven heat release leads to local heat release concentration, resulting in thermoacoustic oscillation

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