Bypass type double-throat passive vectoring sprayer nozzle

Abstract

The invention discloses a bypass type double-throat passive vectoring sprayer nozzle, comprising a sprayer nozzle main body, wherein the inner flow channel of the sprayer nozzle main body comprises front contraction sections of the throats, a bypass convex block, a first throat, a second throat front part expanded contraction section, throat reentrant cavities and a second throat; the front contraction sections of the throats are provided with bypass channels close to the first throat, wherein the inlets of the bypass channels are arranged facing the fluid entrance of the inner flow channel of the nozzle main body while the outlets of the bypass channels are arranged on the first throat. Therefore, the bypass channels are arranged in the double-throat nozzle to change the flow structure in the double-throat nozzle to further make the outflow of the nozzle achieve deviation, that is, producing and maintaining vector deflection. In addition, when the bypass type double-throat passive vectoring sprayer nozzle produces a thrust vector, a little flow loss is caused. The bypass type double-throat passive vectoring sprayer nozzle also has a simple structure, and does not influence performances of the nozzle when the nozzle works normally without vector deflections.

Description

technical field [0001] The invention relates to a bypass type double-throat passive vector nozzle, which is mainly used in all propulsion systems requiring vector thrust, such as thrust vector aero-engines and high-mobility missiles. Background technique [0002] With the development of science and technology, the demand for thrust vectoring of aero-engines is increasing. How to effectively generate vector thrust is a hot spot in the research of various countries. The introduction of the secondary flow of the dual-throat aerodynamic vector nozzle with conventional active secondary jet is generally 3%-10% of the main flow, and requires a high-pressure air source (usually bleed air from the compressor), even if the bleed air is not considered The loss caused by air to engine thrust, and only the design and layout of bleed air pipelines are also very complicated issues for aeroengines. Therefore, it is of great practical value to develop a passive vector nozzle with simple st...

AI Technical Summary

Problems solved by technology

The introduction of the secondary flow of the dual-throat aerodynamic vectoring nozzle with conventional active secondary jets is generally 3%-10% of the main flow, and requires a high-pressure air source (usually from the compressor), even if the intake air is not considered The loss caused by the air to the engine thrust, only the design and layout of the bleed air pipeline is also a very complicated issue for the aero-engine

Images