A gas turbine combustor vane inlet swirl nozzle

Abstract

The invention relates to the technical field of gas turbines and discloses a blade type air inlet 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 inner wall of the shell body in the peripheral direction of the shell body, shell body through holes are formed in the shell body, air inlets communicated with the shell body through holes are formed in the swirl blades, and an angle is formed between each air inlet and the axial direction of the shell body. According to the blade type air inlet swirl nozzle for the combustion chamber of the gas turbine, air is fully mixed with fuel through the air inlets to enhance the mixing of air and fuel gas, and the momentum of airflow is increased in the axial direction 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 vane inlet swirl nozzle, in particular to a gas turbine combustor center inlet swirl nozzle for more reasonable and effective organization of combustion and control of pollutant discharge. 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 particularly impor...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the change of the existing central cone structure will cause difficulties in the design of its internal fuel gas passage. The gap between the central cone and the swirl blades will reduce the overall strength of the nozzle. When oscillating combustion occurs , the vibration intensity of the nozzle will increase, and it is difficult to maintain a reasonable speed and concentration matching

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