Parallel thrust vector exhaust system based on throat offset type pneumatic vector spray pipe

Abstract

The invention discloses a parallel thrust vector exhaust system based on a throat offset type pneumatic vector spray pipe. The system comprises the throat offset type pneumatic vector spray pipe and an adjustable Laval spray pipe arranged on the outer side of the throat offset type pneumatic vector spray pipe, through an inner and outer nested parallel structure, the thrust vector is generated by the throat offset type pneumatic vector spray pipe, and the flow regulation function is realized by the Laval spray pipe connected in parallel on the outer side. According to the parallel thrust vector exhaust system based on the throat offset type pneumatic vector spray pipe, different functions of the spray pipes are realized by utilizing different parts, so that the spray pipes have the characteristics that the thrust vector is efficient, the wide-range flow is adjustable, and infrared signals are reduced; and the smooth transition molded surface is designed, so that the exhaust system has relatively good thrust performance and vector performance at the same time in a wide working range, then the evolution of a fixed geometric thrust vector spray pipe is realized, the flight envelope of an aircraft is expanded, and the use requirements of the aircraft are better met.

Description

technical field [0001] The invention relates to a parallel thrust vectoring exhaust system based on a throat offset aerodynamic vectoring nozzle, belonging to the technical field of advanced thrust vectoring nozzles of aero-engines. Background technique [0002] With the development of science and technology and the improvement of actual demand, more and more thrust vectoring aeroengines will be used in future aircraft. The core of the thrust vectoring aeroengine to realize the thrust vectoring function is the thrust vectoring nozzle. The traditional mechanical thrust vectoring nozzle has complex structure, poor reliability and troublesome maintenance. Therefore, it is imminent to develop a thrust vectoring nozzle with simple structure, light weight and good maintainability. [0003] At present, the fluid thrust vectoring nozzle has gradually become the research focus and research focus of various countries due to its simple structure and light weight, and will enter engin...

AI Technical Summary

Problems solved by technology

This means that as the flight envelope of the aircraft becomes larger and larger, the requirements for the adjustable flow of the nozzle are getting higher and higher, and the inability to adjust the flow of the nozzle with a fixed-geometry nozzle will have more and more adverse effects on the normal and efficient operation of the engine. big impact

At the same time, the convergence angle of the converging section of the front part of the second throat inherent in the throat offset aerodynamic vectoring nozzle is too obvious, resulting in a very large convergence angle of the rear body surface of the nozzle, which will produce an obvious rear body in flight conditions. Resistance, which is extremely unfavorable to the high-speed flight of the aircraft

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