Air-cooling shielding integrated afterburner

Abstract

The invention provides an air-cooling shielding integrated afterburner. The air-cooling shielding integrated afterburner comprises a diffuser casing; the inner cone is arranged in the diffuser casing; a plurality of hollow flow guide supporting plates are installed on the inner cone and connected to the diffuser casing through pull rods, flame stabilizers are arranged at the rear ends of the flow guide supporting plates, the flow guide supporting plates extend in the axis direction of the engine in a bent and twisted mode, and the he front end and the rear end of the flow guide supporting plate are deflected by a preset angle in the circumferential direction, so that a shielding structure is formed; an oil injection rod extending into the flow guide support plates communicates with the oil injection rod outside the diffuser casing through an annular fuel oil main pipe; a confluence ring is installed on the flow guide supporting plates and divides a flow channel between the diffuser casing and the inner cone into a fuel gas flow channel and a cold gas flow channel, fuel gas flows into the fuel gas flow channel and is mixed with fuel oil flowing out of the oil injection rod for combustion, one part of cold gas flows into the cold gas flow channel, and the other part of the cold gas flows into the flow guide supporting plates from a communicating hole formed in the confluence ring; a cooling flow path is formed.

Description

technical field [0001] The application belongs to the technical field of aero-engines, and in particular relates to an air-cooled shielding integrated afterburner. Background technique [0002] like figure 1 Shown is a schematic diagram of the afterburner structure of a typical military aeroengine. The afterburner 10 has a fuel injection system 11 and a stabilization system 12 inside, but generally does not have a cooling design, which leads to a higher temperature at the tail of the afterburner , the high-temperature afterburner internal parts can be directly seen from the rear of the nozzle, and the stealth performance is poor. [0003] In order to overcome the above problems, a relatively advanced afterburner structure of an aero-engine has been proposed in the prior art, such as Figure 2 to Figure 3 As shown, a splitter ring 15 is provided at the front end of the afterburner, and the splitter ring 15 is supported on the conical body through a support plate 14 , and th...

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned structure cannot effectively shield the turbine components, and high-temperature turbine support plates, turbine blades and other components can still be seen from the direction A behind the nozzle, which leads to poor backward infrared and radar stealth performance

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