Exhaust mixing method of refiling pneumatic ribbed jet pipe and device thereof

Abstract

The invention discloses an exhaust mixing method of a refiling pneumatic ribbed pipe and a device thereof. The exhaust mixing method is that refiling cylindrical jet flow jetted to a main flow area of a main jet pipe of the engine is led into the position close to an outlet of the main jet pipe of the engine to lead air flow in the main flow area of the main jet pipe of the engine to generate peripheral rotating component velocity and accelerate the mixing effect of the air flow in the main flow area and air flow of the outside. Therefore, the exhaust mixing method of the refiling pneumatic ribbed jet pipe and the device of the exhaust mixing method narrows the range of the potential flow core area of the outlet of the jet pipe and enhances entrainment capacity of the main air flow so as to improve the mixing effect of the air flow at the outlet of the main jet pipe of the engine and the air flow of the outside.

Description

technical field [0001] The invention relates to a nozzle exhaust mixing method and a device thereof. Background technique [0002] The aircraft exhaust system is a hot gas generating device, its components have a high temperature, and the exhaust itself has a high temperature, so due to thermodynamic and aerodynamic heating, the infrared radiation intensity generated in the infrared window band is much higher than that generated by the background Infrared radiation intensity. According to statistics, the airborne infrared search and track system (IRST) can detect fighter jets at a forward detection distance of up to 185 Km, which seriously threatens the survivability of aircraft. In addition, data shows that the exhaust system is a strong source of infrared radiation. If an advanced stealth exhaust system is used, the infrared radiation intensity of the aircraft can be reduced by 90%, which will reduce the range of the enemy's infrared detector by 68%. The infrared charact...

AI Technical Summary

Problems solved by technology

The current exhaust gas blending devices are mainly lobe blenders and solid small tab blenders. Although these technologies have better blending effects, they will cause a large flow loss to the nozzle. At the same time, in each engine Under working conditions, the blender cannot be adjusted flexibly, and the more complicated shape also brings more difficulties to the processing and manufacturing. Therefore, it is imminent to design a low-resistance, high-performance nozzle exhaust mixing device.

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