engine exhaust system

Abstract

Spiral nozzle This application belongs to the technical field of aero-engine exhaust system structure design, and specifically relates to an aero-engine exhaust system, including a spiral nozzle, the inlet of which is used to connect with the engine exhaust port, and the spiral nozzle is a On the one hand, the shielding of high-temperature components such as aero-engine turbines can be achieved with a relatively small total offset distance; In the flow process of the spiral nozzle, effective turning and mixing can occur, thereby reducing the temperature of the high-temperature airflow, and finally making the temperature of the airflow discharged from it uniform, thereby reducing temperature distortion.

Description

Technical field [0001] The present application belongs to the technical design technology of aerospace engine exhaust system structure, and is specifically involved in an air engine exhaust system. Background technique [0002] At present, the aircraft exhaust system is more axis-symmetrical or binary straight nozzle, which does not have the occlusion capability of high temperature components such as air engine turbines, limiting its invasive performance, using S-type or multi-S type series type Although the exhaust system can achieve the occlusion of high temperature components such as air engine turbines to a certain extent, there is a need for a large total bias, severe aerodynamic loss, and the high and low temperature gas stream in the engine in the exhaust system is lacking in the exhaust system. Molding, the temperature of the jet core area is difficult to obtain effective cooling, and the spray temperature distortion is large. [0003] Therefore, it is desirable to have a...

AI Technical Summary

Problems solved by technology

[0002] At present, most aircraft exhaust systems are axisymmetric or binary direct-injection tubes, which do not have the ability to shield high-temperature components such as aeroengine turbines, which limits the improvement of their stealth performance. S-type or multi-S-type series Although the existing exhaust system can shield high-temperature components such as aero-engine turbines to a certain extent, it requires a large total offset distance, serious aerodynamic loss, and the high- and low-temperature airflow inside and outside the engine lacks effective cooling in the exhaust system. Turning over and mixing, the temperature in the core area of ​​the jet is difficult to be effectively cooled, and the temperature of the jet is greatly distorted

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