Gas turbine combustor axial swirl nozzle

Abstract

The invention relates to the technical field of a gas turbine, and provides an axial swirl nozzle of a combustion chamber of the gas turbine. The axial swirl nozzle has a structure of comprising an outer wall of the nozzle and a fuel injection body inserted into the outer wall of the nozzle, wherein the fuel injection body is internally provided with a center fuel channel; a plurality of fuel spraying pipes which are communicated with the center fuel channel are arranged along the radial direction of the fuel injection body; the side wall of each fuel spraying pipe is provided with fuel spraying holes; a first stage ring-shaped airflow channel is formed between the tops of the fuel spraying pipes and the outer wall of the nozzle; an axial rotational flow device is arranged on the inner wall of the outer wall of the nozzle behind the fuel spraying pipes along the air inlet direction; a second stage ring-shaped airflow channel is formed between the axial rotational flow device and the fuel injection body. Due to the combined action of the fuel spraying pipes and the axial rotational flow device, the fluid speed is reasonably distributed at a fuel spraying outlet, the fuel and the air are evenly mixed, and a combustion area is reasonably controlled, so that combustion stability and good exit temperature distribution are guaranteed.

Description

technical field [0001] The invention relates to the technical field of gas turbines, and in particular provides an axial swirl nozzle of a combustion chamber of a gas turbine. 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 low power generation efficiency and high pollutant emissions (especially NO x Discharge), consumption of fresh water resources and other disadvantages. Gas turbine power generation technology using natural gas as fuel, as one of the clean energy technologies, can effectively reduce pollutant emissions while meeting the requirements of power generation load. emissions are particularly important. [0003] In the combustion chamber of a gas turbine, the fuel gas and air pass through the nozzle to achieve premixing and speed type change, and achieve a reasonable velocity ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of weak swirl strength of air swirl blades in existing gas turbines, poor mixing effect of fuel and air, influence on combustion organization and generation of pollutants

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