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Rotary vertical take-off and landing spray pipe based on quasi-axisymmetric throat offset type pneumatic vectoring spray pipe and design method of rotary vertical take-off and landing spray pipe

A vector nozzle, vertical take-off and landing technology, applied in computer-aided design, design optimization/simulation, calculation, etc., can solve the problems of difficult maintenance, difficult control, complex nozzle structure, etc., to achieve small size and less mechanical structure. , the effect of reducing the number of parts and adjusting the complexity

Active Publication Date: 2021-03-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of the traditional STOL / VTOL nozzle is complex, and the mode switching process is difficult to control and difficult to maintain

Method used

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  • Rotary vertical take-off and landing spray pipe based on quasi-axisymmetric throat offset type pneumatic vectoring spray pipe and design method of rotary vertical take-off and landing spray pipe
  • Rotary vertical take-off and landing spray pipe based on quasi-axisymmetric throat offset type pneumatic vectoring spray pipe and design method of rotary vertical take-off and landing spray pipe
  • Rotary vertical take-off and landing spray pipe based on quasi-axisymmetric throat offset type pneumatic vectoring spray pipe and design method of rotary vertical take-off and landing spray pipe

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Effect test

Embodiment

[0079] Rotating VTOL nozzle based on a throat-offset aerodynamic vectoring nozzle for a typical configuration.

[0080] Figure 8a , Figure 8b What the two figures show is the specific embodiment of the aerodynamic vectoring nozzle using the mechanically disturbed throat displacement type. The ratio of the minor axis to the major axis of the conical surface of this configuration m=b D / a D =b E / a E =0.85, α=arc cos0.85=58.21°. in, Figure 8a Shown is the internal flow field of a nozzle with no disturbance applied near the throat. It can be seen that the airflow of the present invention turns to about 50 degrees at this time, thus vertical take-off and landing cannot be realized. However, when the spoiler that controls the bowing direction is stretched out, the vector nozzle produces a larger angle of airflow deflection.

[0081] Therefore, the present invention further optimizes the value of m for a specific configuration by further optimizing the design, and in the...

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Abstract

The invention discloses a rotary vertical take-off and landing spray pipe based on a quasi-axisymmetric throat offset type pneumatic vectoring spray pipe and a design method of the rotary vertical take-off and landing spray pipe. The rotary vertical take-off and landing spray pipe comprises a fixed cylinder section, a first rotary cylinder section and a second rotary cylinder section. The front end of the first rotary cylinder section can be rotationally connected relative to the tail portion of the fixed cylinder section, and is connected with the actuating end of a first rotary driving mechanism. The front end of the second rotary cylinder section can be rotationally connected relative to the tail portion of the first rotary cylinder section, and is connected with the actuating end of asecond rotary driving mechanism. In a level flight mode, an inner flow channel of the spray pipe is of a typical double-throat structure of the quasi-axisymmetric throat offset type pneumatic vectoring spray pipe, and active and passive pneumatic disturbance or mechanical disturbance is carried out near a first throat. In a vertical take-off and landing mode, through rotation of the first rotary cylinder section and the second rotary cylinder section, an outlet of the spray pipe is made to incline downwards, and under the application of disturbance near the first throat, airflow at the outletof the spray pipe is steered by 90 degrees or above.

Description

technical field [0001] The invention designs a rotary vertical take-off and landing nozzle based on a quasi-axisymmetry throat offset aerodynamic vectoring nozzle and a design method thereof, and belongs to the technical field of advanced thrust vectoring nozzles of aero-engines. Background technique [0002] With the development of science and technology and the urgent needs of practical applications, short-distance / vertical take-off and landing aircraft have once again entered people's field of vision. The structure of the traditional ST / VTOL nozzle is complex, and the mode switching process is difficult to control and difficult to maintain. Therefore, it is necessary to develop a STOL / VTOL exhaust system with simple structure, light weight, good performance, and meeting the needs of high-speed flight. [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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/00F02K1/78G06F30/15G06F30/28G06F113/08G06F119/14
CPCF02K1/004F02K1/78G06F30/15G06F30/28G06F2113/08G06F2119/14
Inventor 黄帅徐惊雷宋光韬潘睿丰张玉琪陈匡世曹明磊成前
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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