Gas Turbine Combustor Nozzles

Abstract

The invention relates to the technical field of gas turbines and provides a gas turbine combustion chamber nozzle. The nozzle includes an air intake chamber and a central fuel body inserted at one end into the air intake chamber. An annular air channel is formed between the central fuel body and the inner wall of the air intake chamber. There is an air intake structure connected with the air intake cavity, and the air intake of the air intake structure is opposite to the air intake direction of the annular air channel; the outer wall of the central fuel body is provided with multiple exhaust channels leading to the air intake cavity, and multiple exhaust channels The air passages are arranged in the circumferential direction; the first fuel passage communicates with a plurality of first fuel injection passages, the top of which is provided with a first injection hole leading to the first fuel passage, and the tops of the plurality of first fuel injection passages are respectively inserted in Among the plurality of exhaust passages, there is an annular gap between the first fuel injection passage and the inner wall of the exhaust passage. The invention can inject fuel into mist, increase the mixing degree of fuel and air, and make it more favorable for combustion.

Description

technical field [0001] The invention relates to the technical field of gas turbines, and in particular provides a nozzle for 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 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 important for organizing combustion and reducing pollutant emissions . [0003] In the combustion chamber of a gas turbine, the fuel gas and air pass thr...

AI Technical Summary

Problems solved by technology

[0004] However, due to the gap at the bottom of the air swirling vane, the airflow deflection angle on the inner peripheral side of the channel is small, and the swirl strength is weak, resulting in poor mixing effect of fuel and air on this side; at the same time, the fuel gas has holes on both sides of the hollow vane Injection, the mixing distance of fuel gas and air is short, and increases the difficulty of blade processing, which affects the combustion organization and the generation of pollutants

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