Radar and infrared comprehensive stealth structure of thrust augmentation type turbofan engine

A turbofan engine and radar technology, which is applied to engine components, engine functions, machines/engines, etc., can solve the problems of short development cycle, low technical difficulty, and small aerodynamic loss, and achieve the effect of improving stealth performance

Pending Publication Date: 2021-01-15
AECC SICHUAN GAS TURBINE RES INST
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Problems solved by technology

[0004] Aiming at the stealth structure with significantly improved stealth performance, small weight gain and aerodynamic loss, high reliability, low technical difficulty, short devel

Method used

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  • Radar and infrared comprehensive stealth structure of thrust augmentation type turbofan engine
  • Radar and infrared comprehensive stealth structure of thrust augmentation type turbofan engine
  • Radar and infrared comprehensive stealth structure of thrust augmentation type turbofan engine

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Embodiment Construction

[0029] The present invention will be described in further detail below by means of specific embodiments:

[0030] Starting from suppressing the characteristic signals of the most important infrared radiation source and radar scattering source, the present invention adopts the method of "step-by-step implementation and mutual consideration": the well-cooled shielding support plate can fully shield the low-pressure turbine blades, and the cold air flow path It can also achieve good cooling of the inner cone, and at the same time promote the mixing of cold air and high-temperature gas, greatly reducing the intensity of infrared radiation; the trailing edge blown flame stabilizer avoids the specular reflection of incident radar waves, and the shielding support plate can guide incident radar The waves are reflected multiple times between the struts and shield the echoes from the turbine blades, significantly reducing the radar cross section. The stealth structure proposed by the pr...

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Abstract

The invention provides a structure suitable for a thrust augmentation type turbofan engine and capable of realizing backward radar and infrared comprehensive stealth. The structure comprises a shielding support plate, an inner cone and a trailing edge blowing flame stabilizer, and is simple in structure, high in reliability, small in weight gain and small in aerodynamic loss, and the radar and infrared stealth performance can be remarkably improved only by virtue of the self structure.

Description

technical field [0001] The invention belongs to the field of aero-engine stealth design and relates to a structure for improving the comprehensive stealth performance of rearward radar and infrared of an afterburning turbofan engine. Background technique [0002] The engine is the most important source of infrared radiation and radar scattering in the backward direction of the aircraft. Suppressing its radar and infrared characteristic signals is very important to realize the high stealth of the aircraft. The most important infrared radiation source for afterburning turbofan engine is the low-pressure turbine blade, inner cone and flame stabilizer and other components, and the most important radar scattering source is the flame stabilizer and low-pressure turbine blade and other components. [0003] In order to improve the stealth performance of the engine's rearward infrared and radar, stealth materials or stealth structures are usually used. Stealth materials have limited...

Claims

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Application Information

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IPC IPC(8): F01D9/04F01D25/12F02C7/18F02K3/10F23R3/20F23R3/28
CPCF01D9/041F01D25/12F02C7/18F02K3/10F23R3/20F23R3/286F05D2260/202
Inventor 李恒李岳锋卢婷邓雪姣马健伏宇李晓明
Owner AECC SICHUAN GAS TURBINE RES INST
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