Slotted swirl nozzle in center body of gas turbine combustor

Abstract

The invention relates to the technical field of gas turbines and discloses an inner body slotting type swirl nozzle for a combustion chamber of a gas turbine. The nozzle comprises a conical inner body, a shell body and multiple swirl blades, wherein the conical inner body is arranged in the shell body, an annular peripheral air channel is formed between the conical inner body and the shell body, the swirl blades are arranged on the conical inner body in the peripheral direction of the conical inner body, multiple slots are formed in the outer circumference of the conical inner body, and the slots and the swirl blades are arranged in a spaced mode. According to the inner body slotting type swirl nozzle for the combustion chamber of the gas turbine, due to the fact that the multiple slots are formed in the conical inner body, the flowing mode of the inner side of the conical inner body is changed, and the strength of mixed cyclonic air current is reduced and axial speed is increased so as to be matched with fuel concentration and speed distribution on an outlet of the nozzle. The nozzle has the advantages that combustion organization is achieved reasonably and effectively and pollutant discharge is controlled reasonably and effectively.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a gas turbine combustor central body slotted swirl nozzle, in particular to a gas turbine combustor central body slotted swirl nozzle for more reasonable and effective organization of combustion and control of pollutant emissions. Background technique [0002] In my country's current energy structure, thermal power generation using traditional coal-fired technology occupies the vast majority of the share. However, this traditional power generation technology has disadvantages such as low power generation efficiency, high pollutant emissions, especially NOx emissions, and high consumption of fresh water resources. As one of the clean energy technologies, the gas turbine power generation technology fueled by natural gas can effectively reduce pollutant emissions while meeting the power generation load requirements. Among them, the design of the gas turbine combustor nozzle is ...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the velocity distribution inside and outside the existing center cone has a large difference, the rising height of the fuel injection hole is limited by the height of the casing, and it is difficult to match the velocity distribution and the fuel concentration distribution; Difficulty caused by tissue combustion after the gas enters the combustion chamber; it is difficult to maintain a reasonable speed and concentration matching after oscillating combustion caused by changing working conditions or other reasons

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