Direct-injection type fan-shaped nozzle applied to cavity structure of afterburner

Abstract

The invention discloses a direct-injection type fan-shaped nozzle applied to a cavity structure of an afterburner, relates to the direct-injection type fan-shaped nozzle which is installed in the cavity of the afterburner and used for enhancing fire stabilization performance and flame connection performance, and belongs to the field of aeroengines. According to the direct-injection type fan-shapednozzle applied to the cavity structure of the afterburner, a plurality of direct-injection type spray holes distributed in a certain shape are formed in the bottom end of each oil injection rod and used for spraying fuel into the cavity structure in the afterburner, the fuel forms a fan-shaped oil mist annular surface after being sprayed and atomized through the shape of the holes, the fan-shapedoil mist surfaces of every two adjacent oil injection rods intersect, and an oil mist ring concentric with a casing is formed in the cavity structure. The fuel atomization effect is enhanced, the circumferential flame connection performance is enhanced, and the combustion efficiency is improved. The direct injection type fan-shaped nozzle is small in machining difficulty, high in machining precision and small in nozzle hole diameter, so that the fuel atomization effect is good, and the overall performance of the afterburner is greatly improved.

Description

technical field [0001] The invention belongs to the field of fuel atomization of aero-engines, and relates to a direct-shooting fan nozzle with simple structure and convenient processing, which is installed in the cavity of an afterburner chamber and enhances the ability to stabilize fire and cross-flame. Direct fan nozzle with concave cavity structure. Background technique [0002] The invention of the nozzle structure is to turn a certain liquid into a droplet atomization structure. According to the atomization mechanism, it can be divided into pressure atomization and air atomization nozzles; according to the spray form, it can be divided into direct nozzles, cone nozzles, and fan nozzles. In the field of aero-engines, in order to organize the high-efficiency combustion of aviation kerosene in a small space and a short time, a centrifugal nozzle (belonging to the pressure atomization nozzle) is usually used to couple the air swirler to form a fuel-air mixture in the main...

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Problems solved by technology

[0004] Aiming at the deficiencies of the direct jet nozzle and the fan nozzle in the afterburner existing in the prior art, the present invention proposes a new direct jet fan nozzle applied to the cavity structure of the afterburner, which combines the atomization of the fan nozzle The advantage of both the effect and the simple processing of the direct-injection nozzle, by setting up a plurality of direct-injection nozzle holes on the side of the fuel injection rod, the fan-shaped oil mist arc surface formed by the nozzle holes of the present invention solves the problem of fuel accumulation and dripping at the outlet existing in the prior art , the technical defect of the downstream fuel atomization effect is poor

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