Two-phase fuel nozzle

Abstract

The invention discloses a two-phase fuel nozzle. The nozzle comprises a nozzle body, and a liquid fuel flow channel, an auxiliary air flow channel and a gas fuel flow channel are arranged in the nozzle body. The liquid fuel flow channel, the auxiliary air flow channel and the gas fuel flow channel are sequentially arranged from inside to outside in a concentric circle mode. The flow inlet ends ofthe auxiliary air flow channel and the gas fuel flow channel communicate with the outer side wall of the nozzle body, the flow inlet end of the liquid fuel flow channel is connected with a gas-liquidsealing component, and the flow inlet end of the liquid fuel flow channel communicates with the end face of the flow inlet end of the nozzle body through the gas-liquid sealing component. A fuel atomizer and an air cyclone are arranged in the spraying end of the nozzle body; the fuel atomizer is communicated with the outflow end of the liquid fuel flow channel, the air cyclone is communicated withthe outflow end of the auxiliary air flow channel so that auxiliary atomized air can form rotational flow in the air cyclone to further atomize liquid fuel sprayed out of the fuel atomizer, and the end face of the spraying end of the nozzle body is communicated with the outflow end of the gas fuel flow channel.

Description

technical field [0001] The invention relates to the technical field of gas turbines, in particular to a two-phase fuel nozzle. Background technique [0002] Existing gas turbines, especially aeroderivative gas turbines improved from aero-engines, mainly use natural gas and fuel oil as the medium of use, that is, a fuel nozzle can inject natural gas and fuel oil into the combustion chamber of the gas turbine, and an auxiliary fuel nozzle is also installed in the fuel nozzle. The atomizing air circuit is used to supply auxiliary atomizing air for auxiliary atomizing of fuel. [0003] Since the temperature of the fuel oil is generally around 20°C, and the temperature of the auxiliary atomizing air from the compressor is around 300°C, it is particularly difficult to seal between two flow paths with large temperature differences. If there is no good seal, sealing will easily occur The failure of the nozzle leads to cracking and coking of the fuel under the action of the leaking ...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a two-phase fuel nozzle to solve the problem that the existing two-phase fuel nozzle is easy to leak high-temperature air, which leads to cracking and coking of liquid fuel, and then blocks the oil passage and the technology of complex structure and high production cost of the two-phase fuel nozzle question

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