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.

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

The invention discloses an afterburner with a circular arc-shaped fan-shaped nozzle and a concave cavity structure, and belongs to the field of aero-engines. Flame can be stabilized by utilizing a concave cavity structure formed by a supporting plate and a forced inner cone, the fuel space atomization effect of the forced inner cone in the circumferential direction is enhanced by adopting the circular arc-shaped fan-shaped nozzle, the fuel spray expansion angle in the circumferential direction of the forced inner cone can be increased, so that the distribution of the fuel space in the circumferential direction is more uniform. According to the afterburner, the afterburner can be smoothly ignited under various complex working conditions, and flame propagation is realized along the concave cavity in the circumferential direction of the forced inner cone, so that the combustion stability in the afterburner is effectively improved; and meanwhile, the length of the afterburner is shortened,the total pressure recovery coefficient is improved, the flow loss is reduced, the combustion efficiency is increased, the generation of pollutants such as NOx and CO are effectively reduced, and theoverall performance of the engine is improved.

Afterburner with circular arc-shaped fan-shaped nozzle and concave cavity structure

The invention discloses an afterburner adopting planar fan nozzles for oil supply, and belongs to the field of aero-engines. The afterburner adopting the planar fan nozzles for oil supply is characterized in that supporting plates are arranged on an oil supply device in the afterburner, and are uniformly arranged along the circumference of the afterburner in the perpendicular direction; and oil spraying rods are arranged on the inner sides of the supporting plates in the radial direction, the planar fan nozzles are arranged on the side walls of the oil spraying rods in the radial direction, and the opening cross section of each planar fan fuel nozzle is V-shaped. According to the design of the afterburner adopting the planar fan nozzles for oil supply, the fuel spray extending angle is enlarged, the number of the nozzles is reduced, the diameter of each nozzle is increased, and meanwhile, the fuel radial and circumferential concentration distribution is more uniform, so that reliable and stable combustion of the afterburner is facilitated, and the problems in the prior art are solved.

Li Jinghua

Papers

Afterburner with circular arc-shaped fan-shaped nozzle and concave cavity structure

Afterburner adopting planar fan nozzles for oil supply