Afterburner with airflow channel designed in rectifying support plate

Abstract

The invention provides an afterburner with an airflow channel designed in a rectifying support plate, the oil and gas mixing degree can be effectively improved, the mixed gas staying time is prolonged, and the combustion efficiency is improved. Airflow from an inner duct and an outer duct is mixed among rectifying support plate flame stabilizers through a sliding baffle type rear duct ejector, airflow enters the support plate from small air inlet holes formed in the surfaces of the two sides of the rectifying support plate flame stabilizers and passes through the airflow channel formed by partition plates, the speed is reduced in the process, fuel oil in fuel oil channels is heated, then the fuel oil is sprayed out towards the center on the back through small air spraying holes formed in the surfaces of the tail flame stabilizers, the fuel oil enters fuel oil channels in the rectifying support plate flame stabilizers through oil supply pipelines, after being heated, the fuel oil is sprayed out through small oil spraying holes connected with the surfaces of the flame stabilizers, the fuel oil is disturbed through multiple strands of airflow, the fuel oil is further heated and mixed with the airflow, and combustion is conducted in a back low-speed backflow area. The fuel oil is good in heating, atomizing and evaporation effect and is disturbed by the airflow, the oil and gas mixing time is long in the low-speed area, accordingly the oil and gas mixing effect is good, and therefore the combustion efficiency can be improved. Meanwhile, ignition and stable combustion can be achieved under the condition of the small oil and gas ratio.

Description

technical field [0001] The invention belongs to the field of gas turbine engines, and in particular relates to an afterburner in which an air flow channel is designed in a rectifying support plate. Background technique [0002] The afterburner is an important part of an aero-engine. Although its mass only accounts for about 20% of the total mass of the engine, it can greatly increase the thrust of the engine. The turbojet engine uses an afterburner, and the thrust increase ratio can reach 40% to 50%; the turbofan engine uses an afterburner, and the thrust increase ratio can reach 60% to 70% or even higher. The use of the afterburner can greatly increase the unit head-on thrust and thrust-to-weight ratio of the engine, comprehensively improve the maneuverability of the aircraft and expand the flight envelope, and improve the air superiority of the fighter. As such, the afterburner has played an important role in the development of military aircraft. However, since the afte...

AI Technical Summary

Problems solved by technology

Adopting this scheme will greatly reduce fluid loss, reduce the length of the afterburner, and reduce the mass, but it still does not solve the problem of low combustion efficiency

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