Afterburner Fuel Supply

Abstract

The invention relates to an oil supply device, in particular to an afterburner oil supply device which comprises an oil supply pipe, an inner side cooling cavity, a fuel nozzle, gas supply pipes, an inner side wall, a resonant cavity, a resonant cavity body, slits, a V-shaped baffle, an outer side cooling cavity, an outer side wall, an outer side cooling cavity gas inlet and an inner side cooling cavity air inlet. The oil supply pipe is located on the head portion of the oil supply device, the gas supply pipes are located on the two sides of the oil supply device, and each of the two sides of the oil supply device is provided with three gas supply pipes which are evenly distributed. Fuel drips are sprayed out through the slits, cooling gas enters the outer side cooling cavity and the inner side cooling cavity through the outer side cooling cavity gas inlet and the inner side cooling cavity gas inlet respectively, the V-shaped baffle is mounted on the tail portion of the oil supply device, the inner side wall and the outer side wall are provided with cooling holes, and part of cooling gas in the inner side cooling cavity and the outer side cooling cavity is sprayed out from the cooling holes and forms cooling gas films on the surface of the inner side wall and the surface of the outer side wall. Fuel can be completely atomized, and emission of pollutants is reduced; the problems that airflow velocity is high and temperature is high at an inlet of an aero-engine afterburner are solved.

Description

technical field [0001] The invention relates to a fuel supply device, in particular to an atomized flame-stabilizing fuel supply device for an afterburner of an aero-engine. Background technique [0002] For fighter jets, in order to obtain altitude and speed advantages, expand the flight envelope, supersonic flight and other combat requirements on the battlefield, the engine is required to provide the maximum thrust in a short period of time to meet the work requirements of take-off, climbing, acceleration, and pursuit. The engine is required to increase thrust in a short time, so the concept of "afterburner" appeared. Generally speaking, the afterburner is located between the engine turbine and the tail nozzle. By re-injecting fuel and burning again, the total thrust can be increased by about 50% or even higher than the original maximum thrust in a short period of time. Afterburner Chambers have been widely used in active military aeroengines. Generally, the airflow velo...

AI Technical Summary

Problems solved by technology

However, the high-speed injection of fuel to a concave surface to achieve atomization may lead to incomplete atomization process, with greater randomness, uneven distribution of atomized droplet diameter, and increased pollutant emissions; and using this method to supply fuel Undoubtedly, it will increase the circumferential distribution range of fuel, which may cause some fuel droplets to splash to the afterburner casing, causing local carbon deposition and affecting the service life and safety of the engine.

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