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Air flow guide device

A technology of airflow guidance and deflation valve, applied in jet propulsion, machine/engine, etc., can solve problems such as engine efficiency loss and noise

Active Publication Date: 2014-01-15
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discharged high-pressure gas has not been effectively utilized. On the one hand, it causes the loss of engine efficiency, and on the other hand, it also causes noise due to mixing with the original airflow of the external duct.

Method used

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Embodiment Construction

[0026] As required, specific embodiments of the invention will be disclosed herein. However, it should be understood that the embodiments disclosed herein are merely typical examples of the invention, which can be embodied in various forms. Therefore, specific details disclosed herein are not to be considered limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the invention in any appropriate way in practice, This includes taking various features disclosed herein and combining features that may not be expressly disclosed herein.

[0027] Such as figure 2 , image 3 shown, combined with Figure 5 , Image 6 , the airflow guiding device 100 according to the preferred embodiment of the present invention is adapted to the blow-off valve 5 after the supercharging stage of the fan in the aero-engine and fixed on the casing flange 6 of the engine. The airflow guiding device 100 comprises a base 1 f...

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Abstract

The invention relates to an air flow guide device and belongs to the technical field of aero-engines. The air flow guide device is in fit with an exhaust valve behind a fan supercharger in an aero-engine and is fixed to an aero-engine casing part flange. The air flow guide device comprises a flow guide part, a radial air flow inlet and an axial air flow outlet, wherein the radial air flow inlet is located in one side of the valve, the axial air flow outlet is formed far away from one side of the valve, and the section of the flow guide part retracts roughly in the flowing direction of air flow. By means of the air flow guide device, exhausted gas can be utilized effectively and is made to generate certain thrust, and therefore the dynamic property of the aero-engine is improved, and due to the uniform axial air flow, noise made when exhausted gas of the aero-engine is mixed can be lowered. In addition, the air flow guide device is simple in structure and good in assembly performance, and does not affect normal operation of a prior exhaust valve.

Description

technical field [0001] The present invention relates generally to aero-engine technology, and more particularly to an exhaust flow guiding structure for an aero-engine. Background technique [0002] In a turbofan engine with a high bypass ratio, an adjustable bleed valve is usually provided after the supercharging stage of the fan, and the valve is opened when the engine is at a low speed and the thrust is set in a transition state to reduce the gas flow entering the high-pressure compressor. Improve engine surge margin. However, while the measure of bleed air through the valve improves engine stability, it also causes a loss in engine efficiency. [0003] figure 1 A structural schematic diagram of an existing high bypass ratio turbofan engine is given. Such as figure 1 As shown, along the axial flow direction a' of the airflow, the engine has a large-sized fan 1', the fan outlet is divided into inner and outer channels, and part of the fan outlet air flow passes through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K3/04
Inventor 张荣魏芳
Owner AECC COMML AIRCRAFT ENGINE CO LTD