Throat offset type pneumatic vector spraying pipe with inner S bend

Abstract

The invention discloses a throat offset type pneumatic vector spraying pipe with an inner S bend. An inner channel of the throat offset type pneumatic vector spraying pipe comprises a spraying pipe inlet, an equal straight section, a throat channel I front convergence section, a throat channel I, a throat channel II front expansion section, a throat channel II front convergence section and a throat channel II (spraying pipe outlet), wherein the spraying pipe inlet, the equal straight section, the throat channel I front convergence section, the throat channel I, the throat channel II front expansion section, the throat channel II front convergence section and the throat channel II (spraying pipe outlet) sequentially communicate with each other. A spindle-shaped central cone is arranged in aconcave cavity, wherein the concave cavity is formed by the throat channel II front expansion section and the throat channel II front convergence section. A cavity of a traditional throat offset typepneumatic vector spraying pipe is changed into symmetrical S bend channels by adopting a special-profile central cone, so that an engine turbine blade grid and a spraying pipe front inner channel areshielded. A specially optimized spraying pipe rear body outer profile surface is introduced for assisting. On the premise of ensuring non-substantial decreasing of thrust vector performance, the lowdetectability of the spraying pipe is obviously improved. Furthermore, by controlling the front and back movement of the central cone, the spraying pipe outlet area can be adjusted, the usage of envelopes for the spraying pipe is enlarged, and the flow stability under the low working blowdown ratio is improved.

Description

Technical field [0001] The invention relates to a throat offset type aerodynamic vectoring nozzle with an inner S-curve, belonging to the technical field of advanced thrust vectoring nozzles for aero engines that takes into account radar stealth. Background technique [0002] With the development of science and technology and the increase in actual demand, low detectability and high maneuverability have gradually become important assessment indicators and evaluation criteria for the next generation of military aircraft. [0003] To achieve high maneuverability, thrust vectoring aero engine has become an indispensable component. The core of the thrust vectoring function of the thrust vectoring aeroengine is the thrust vectoring nozzle. The traditional mechanical thrust vectoring nozzle has complex structure, poor reliability and troublesome maintenance. [0004] At present, the fluid thrust vectoring nozzle has gradually become the research focus and research hotspot of various count...

AI Technical Summary

Problems solved by technology

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.

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