Flow adjustment device for axisymmetric channel, tail nozzle using said device and adjustment method

Abstract

The invention discloses a flow regulating device for an axisymmetric channel, a tail nozzle using the device and a regulating method. Both the plate and the basic plate are axisymmetric structures with a lobed design; the tail nozzle using the device includes a constriction section, a throat and an expansion section according to the flow direction of the nozzle, and the rotating stopper and the basic plate are arranged at the throat. By rotating the baffle around the axis of the tail nozzle, the mutual cooperation with the relative position of the basic plate is completed, and the adjustment of the actual flow geometric area of ​​the axisymmetric tail nozzle is realized, thereby meeting the flow adjustment requirements of the axisymmetric tail nozzle. The flow regulating device of the present invention is simple, light in weight, large in adjustable range, and high in regulating efficiency. The structure of the tail nozzle adopting the flow regulating device of the present invention is simpler, and the thrust performance is still maintained at a relatively high level, which better satisfies the needs of engines and aircraft. usage requirements.

Description

technical field [0001] The invention relates to the control technology of an aero-engine exhaust system, in particular to a flow regulating device for an axisymmetric channel, a tail nozzle using the device and a regulating method. Background technique [0002] The tail nozzle is one of the important parts of the aero-engine. In order to better match the configuration of the engine's annular combustion chamber, the tail nozzle basically adopts an axisymmetric configuration with a circular flow section. Its main function is to accelerate the expansion of high-temperature, high-pressure gas after the turbine and discharge it from the engine, thereby providing thrust for the aircraft. [0003] As the operating conditions of the aircraft continue to change, the flow required by the aero-engine is constantly changing. By adjusting the throat flow rate of the engine exhaust pipe, the proportion distribution of gas expansion in the turbine and nozzle can be further changed, thereb...

AI Technical Summary

Problems solved by technology

The disadvantage is that the design method of the overall fish scale is complex and the adjustable range is small

[0006] It can be seen that in order to realize the geometric adjustment of the axisymmetric nozzle, various evolution schemes based on the mechanical adjustment of fish scales are basically adopted, but the mechanical actuation mechanism is relatively complicated, the weight is large, and the adjustment range is limited. Restricted by objective factors, it cannot be fully resolved

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