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Supercharging stage device and turbofan engine

A technology of turbofan engine and supercharging stage, which is applied in the direction of machines/engines, jet propulsion devices, mechanical equipment, etc., and can solve the problem of affecting the overall supercharging capacity of the supercharging stage, insufficient power added by the first supercharging stage, and reducing supercharging In order to improve the supercharging capacity and anti-distortion ability, reduce the D factor and improve the surge margin, etc.

Active Publication Date: 2021-10-01
AECC SHANGHAI COMML AIRCRAFT ENGINE MFG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem in the prior art that the uneven flow of the fan in the supercharging stage will lead to insufficient work of the first supercharging stage, which will affect the overall supercharging capacity of the supercharging stage and reduce the internal channel of the supercharging stage. Defects of surge margin, providing a booster stage device and a turbofan engine

Method used

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  • Supercharging stage device and turbofan engine
  • Supercharging stage device and turbofan engine
  • Supercharging stage device and turbofan engine

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Embodiment 1

[0045] This embodiment discloses a turbofan engine, and the turbofan engine includes a supercharging stage device.

[0046] Please refer to figure 1 , figure 1 A schematic diagram of the aerodynamic layout of the supercharging stage device of the turbofan engine proposed by the present invention is shown in . Wherein, in the following description of this embodiment, a turbofan engine is taken as an example for illustration. Those skilled in the art will easily understand that since turbofan engines generally also include structures such as compressors, combustion chambers, and turbines, in order to combine the turbofan engines proposed by the present invention, especially its supercharging stage device, with the above-mentioned structures Composing a turbofan engine, while making various modifications, additions, substitutions, deletions or other changes to the above turbofan engine, especially its supercharging stage arrangement, these changes are still within the scope of ...

Embodiment 2

[0064] The supercharging stage device in this embodiment is substantially the same in structure as the supercharging stage device in Embodiment 1, the difference is that: in this embodiment, the supercharging stage assembly has a third supercharging stage 40, and With a fourth supercharging stage. Wherein, the third supercharging stage 40 is arranged between the second supercharging stage 30 and the fourth supercharging stage, and the fourth supercharging stage is arranged between the third supercharging stage 40 and the outlet.

[0065] And, in this embodiment, the boosting ratio of the third boosting stage 40 is set lower than that of the second boosting stage 30, and the boosting ratio of the fourth boosting stage is set lower than that of the third boosting stage. Boost ratio of boost stage 40 .

[0066] The supercharging stage device in this embodiment is a supercharging stage device of a four-stage supercharging stage configuration. By setting the supercharging ratio of...

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Abstract

The invention discloses a supercharging stage device and a turbofan engine. The supercharging stage device is used to be arranged in the turbofan engine. The supercharging stage device includes an internal passage and a supercharging stage assembly. The supercharging stage assembly is arranged in the internal passage. The connotation channel has an inlet and an outlet. The inlet is connected to the inlet of the turbofan engine, and the outlet is connected to the inlet of the high-pressure compressor. The supercharging stage assembly includes the first supercharging stage and the second supercharging stage. Between the inlet and the second supercharging stage, the supercharging ratio of the first supercharging stage is set lower than that of the second supercharging stage, and the pressure ratio distribution of the first supercharging stage and the second supercharging stage is passed through The load factor is adjusted, and the load factor of the first supercharging stage is 9%~15% lower than that of the second supercharging stage. The supercharging stage device of the present invention makes the supercharging ratio of the first supercharging stage smaller than the supercharging ratio of the second supercharging stage by changing the design scheme of the highest supercharging ratio of the traditional first supercharging stage, thereby increasing the supercharging stage The surge margin of the internal channel of the device.

Description

technical field [0001] The invention relates to a booster stage device and a turbofan engine. Background technique [0002] The supercharging stage is one of the important parts of the turbofan engine. It is located between the fan and the high-pressure compressor. Its main function is to increase the flow rate of the core engine and the total boosting ratio of the compressor. It usually consists of two to four stages of rotor stators. Air flows through each stage of rotor to achieve power addition and boosting. In the aerodynamic design, the total boost ratio of the entire boost stage is achieved by specifying the different boost ratio distributions of the rotors of each stage, and the different boost ratio distribution forms between the rotors of each stage directly affect the performance of the fan / boost stage. [0003] At present, the bypass ratio design of the turbofan engine is constantly increasing, and the size of the fan is increasing, which leads to a correspondin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K3/06F04D19/02F04D27/02
CPCF02K3/06F04D19/02F04D27/02
Inventor 杨小贺高倩黎晨陈云永
Owner AECC SHANGHAI COMML AIRCRAFT ENGINE MFG CO LTD
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