A distributed multi-nozzle combustor

Abstract

The invention relates to the technical field of gas turbines, and discloses a distributed multi-nozzle combustion chamber. The distributed multi-nozzle combustion chamber comprises a flame tube, a plurality of nozzles and a plurality of diverging sections, wherein each nozzle is provided with the diverging section which corresponds to the nozzle and is coaxially arranged with the nozzle, the nozzles are connected through the small-diameter ends of the diverging sections corresponding to the nozzles, the large-diameter ends of the diverging sections are connected with the end wall of the flametube, and the diverging angles of the diverging sections are smaller than or equal to the natural diverging angles of flames of the nozzles in the flame tube. According to the distributed multi-nozzlecombustion chamber, the diverging sections with the diverging angles smaller than or equal to the natural diverging angles are arranged, and the nozzles communicate with the flame tube through the diverging sections, so that unsteady pulsation of the flames is restrained, interaction among the flames of different nozzles is weakened, and then the common problem of combustion instability in a distributed multi-nozzle combustion chamber is restrained; and the distributed multi-nozzle combustion chamber has the advantages of remarkable inhibition effect, simple structure, wide application range,no need of extra regulation and control devices and the like.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a distributed multi-nozzle combustion chamber. Background technique [0002] Gas turbines have played an important role in thermal power generation, power grid peak shaving, natural gas pipeline pressurized transportation, ship power, etc. It has the advantages of rapid start-up, large output power, and flexible fuel. However, with increasingly stringent environmental protection regulations, higher requirements are placed on the pollution emissions of gas turbines, especially nitrogen oxide emissions. In order to reduce the emission of nitrogen oxides, gas turbines have begun to adopt lean oil premixed combustion technology more, but this technology will cause serious combustion instability problems, resulting in large pressure fluctuations in the combustion chamber, easy to cause flashback, and even cause gas turbine The structural damage of the gas turbine will endanger t...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned technical defects and application requirements, the embodiment of the present invention provides a distributed multi-nozzle combustor, which is used to solve the combustion instability problem caused by the use of lean premixed combustion technology in the distributed multi-nozzle combustor

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