Mechanically assisted flow-adjustable throat offset pneumatic vectoring nozzle and its control method

Abstract

The invention discloses a mechanically-assistant flow-adjustable throat offset-type pneumatic vectoring exhaust nozzle and a control method thereof. The mechanically-assistant flow-adjustable throat offset-type pneumatic vectoring exhaust nozzle comprises an exhaust nozzle inner flow pass which is sequentially provided with a first throat and a second throat according to the flowing direction of a fluid; the position, tightly close to the first throat, of the exhaust nozzle inner flow pass is divided into a primary flow pass body axially arranged along the exhaust nozzle inner flow pass and a secondary flow pass body located between the wall surface of the exhaust nozzle inner flow pass and primary and secondary flow separation blocks by arranging the primary and secondary flow separation blocks; the two primary and secondary flow separation blocks are symmetrically distributed on the upper side and the lower side of the axis of the exhaust nozzle primary flow pass body; the sections of all the primary and secondary flow separation blocks are each in a hollow triangular shape with variable inner cavity areas, and the top points of the two triangular-shape primary and secondary flow separation blocks are adjacently arranged, and the bottom edges of the two triangular-shape primary and secondary flow separation blocks are arranged away from each other; and additionally, in the two end points of the bottom edges of the primary and secondary flow separation blocks, the position of the end point adjacent to the first throat is fixed, and the positions of the other residual end points and the top points of the primary and secondary flow separation blocks are movable. Thus, according to the mechanically-assistant flow-adjustable throat offset-type pneumatic vectoring exhaust nozzle, the areas of the throats can be changed, and further the flow of the exhaust nozzle can be adjusted.

Description

technical field [0001] The invention relates to a throat offset type pneumatic vector nozzle and a control method thereof. Background technique [0002] With the development of science and technology and the improvement of actual demand, future aircraft have higher and higher requirements for maneuverability, and as the main means to improve the maneuverability of aircraft, thrust vectoring nozzles are increasingly used in aero-engines. At the same time, in order to meet the performance requirements of the aircraft in the full flight envelope, higher requirements are put forward for the flow regulation and afterburning performance of the nozzle. Therefore, nozzle devices with both flow regulation and thrust vectoring functions will be more favored in future high-mobility aircraft. [0003] At present, the thrust vectoring nozzle is divided into two types: mechanical type and fluid type. Among them, the fluid thrust vectoring nozzle has become the research focus and research...

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Problems solved by technology

[0005] The present invention aims at the deficiency that the existing nozzle cannot realize the flow adjustment, based on the throat offset type aerodynamic vector nozzle combined with fluid mechanics knowledge and relevant nozzle design methods, the inner shape of the traditional throat offset type aerodynamic vector nozzle is improved. The structure of the surface has been improved and redesigned, so that the inner surface of the nozzle is changed from a geometrically fixed structure to a movable part. During the working process, the area of ​​the throat can be changed by adjusting the corresponding configuration according to the needs, and then the flow of the nozzle can be adjusted. At the same time, it can also achieve the effect of mechanical auxiliary vector

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