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Surge detection method and system for turbofan engine

A turbofan engine and detection method technology, applied in the direction of machines/engines, mechanical equipment, non-variable pumps, etc., can solve problems such as stall or surge, performance degradation of engine components, etc., and achieve the effect of improving flight safety

Active Publication Date: 2022-04-08
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is still possible to enter a severe stall or surge due to degraded engine components, exposure to rain, ice, hail, birds, or other external factors

Method used

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  • Surge detection method and system for turbofan engine
  • Surge detection method and system for turbofan engine
  • Surge detection method and system for turbofan engine

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings. In the following description, more details are set forth in order to fully understand the present invention, but the present invention can obviously be implemented in a variety of other ways different from this description, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific implementation manner should not limit the protection scope of the present invention.

[0032] For example, the description that the first feature described later in the description is formed on or above the second feature may include the embodiment in which the first and second features are formed through direct contact, and may also include an embodiment in which the first and second features are formed. Embodiments that form addition...

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Abstract

The invention provides a surge detection method for a turbofan engine, which obtains the representative rotational speed N2R0 of the high-pressure rotor, the first-order time derivative N2dot of the physical rotational speed of the high-pressure rotor, the outlet pressure Ps3 of the high-pressure compressor, and the first-order time derivative Ps3dot of the outlet pressure of the high-pressure compressor and the second-order time derivative Ps3dotdot of the outlet pressure of the high-pressure compressor; real-time calculation of the surge determination index A=SG1*(v1+SG2*(v2+SG3*v3+SG4*v4)), when A is greater than the given threshold Ath, then It is judged that surge occurs. The present invention also provides a surge detection system for implementing the above surge detection method. The above surge detection method can achieve the purpose of real-time detection of turbofan engine surge.

Description

technical field [0001] The invention relates to a surge detection method for a turbofan engine, and also includes a surge detection system for a turbofan engine. Background technique [0002] For aviation turbofan engines, the high-pressure compressor is prone to stall at certain speeds and ambient conditions. As the pressure ratio and angle of attack of the compressor blades increase, several airfoil rows may stall due to flow separation at the suction side. When a stall becomes severe, or when it occurs suddenly, some unacceptable flow conditions can result. Surge can occur throughout the speed range as long as surrounding components force the compressor line up and the pressure ratio to rise to the compressor surge limit. In this region, the blade stall becomes so severe that the flow over the blade surface can no longer withstand the adverse pressure gradient. If the pressure ratio is increased slightly, the airflow will be separated immediately. Part of the airflow ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
CPCF04D27/001
Inventor 王玉东阙建锋唐鸿羽
Owner AECC COMML AIRCRAFT ENGINE CO LTD