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Forward radar stealth structure of aero-engine

A stealth technology for aero-engines and radars, applied to engine components, machines/engines, mechanical equipment, etc., can solve problems such as difficult engineering applications, unsatisfactory, and limited wave-absorbing capabilities, and achieve the effect of improving stealth capabilities

Active Publication Date: 2021-09-07
AECC SHENYANG ENGINE RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the further improvement of the stealth aircraft's requirements for the engine's forward stealth performance, the simple cone modification of the fan cap and radar absorbing coating can no longer meet the stealth performance requirements of the high-stealth aircraft for the engine.
[0003] Although the existing radar stealth technology scheme for engine forward fan components can improve the engine forward radar stealth performance, due to the constraints of fan aerodynamic performance, reliability and other factors, the thickness of the radar absorbing coating is thin and the absorbing ability is limited, so it cannot Taking into account the radar stealth requirements of broadband, it is even more unable to meet the higher requirements of the future high stealth aircraft on the engine's forward radar stealth performance
At the same time, since the radar absorbing coating is applied to the fan part at the front end of the engine, the fan part has strong high-frequency vibration, and the bonding reliability between the coating and the metal substrate will directly affect the safety of the engine. Therefore, the radar absorbing coating is used in The engineering application of fan components is more difficult and has a greater impact on the safety of the engine
[0004] In summary, the existing aero-engine forward radar stealth technology cannot meet the requirements of broadband radar stealth capabilities, and cannot meet the higher requirements of future high-stealth aircraft for engine forward radar stealth performance. The existing aero-engine forward radar absorbs Coating application technology has a great impact on engine safety

Method used

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  • Forward radar stealth structure of aero-engine
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  • Forward radar stealth structure of aero-engine

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...

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Abstract

The invention belongs to the field of aircraft engine design, and relates to a forward radar stealth structure of an aero-engine. The structure comprises an engine air inlet casing (1), wherein the engine air inlet casing (1) is provided with a plurality of fixed supporting plates (11); the front end of the engine air inlet casing (1) is provided with a wave-absorbing flow guide structure (2);, the front end of the wave-absorbing flow guide structure (2) is provided with an air-entraining metal front edge (3); the wave-absorbing flow guide structure (2) is provided with a wave-absorbing supporting plate (21); the air-entraining metal front edge (3) is provided with a front edge supporting plate (31); the tail end of the front edge supporting plate (31), the cross section of the wave-absorbing supporting plate (21) and the cross section of the fixed supporting plate (11) in the axial direction of the air inlet casing are equal in width; and the cross section in the axial direction of the air inlet casing is gradually shrunk from the tail end of the front edge supporting plate (31) to the front end of the front edge supporting plate (31). According to the forward radar stealth structure of the aero-engine provided by the invention, the wave-absorbing flow guide structure and a wave-absorbing cap cover are additionally arranged at the front end of the air inlet casing of an engine fan, so that the RCS of a forward radar of the engine is remarkably reduced, and the stealth capacity of the forward radar of the engine is effectively improved.

Description

technical field [0001] The application belongs to the field of aircraft engine design, in particular to an aeroengine forward radar stealth structure. Background technique [0002] With the gradual improvement of stealth performance requirements of aero-engines for stealth aircraft, the demand for radar stealth design of engine forward fan components is increasing. At present, most of the aero-engines in service do not consider forward radar stealth, and only a few types of aero-engines have adopted radar stealth measures for the forward-facing fan components, including the modification of the cone of the fan cover and the application of radar absorbing coatings. For example, the fan cover of the F-135 engine adopts a pointed cone modification design to avoid the reflection direction of the incident electromagnetic wave. Absorb and refract. However, with the further improvement of the stealth aircraft's requirements for the engine's forward stealth performance, the simple ...

Claims

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Application Information

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IPC IPC(8): F02C7/00F02C3/04F01D25/24F01D25/00
CPCF02C7/00F02C3/04F01D25/24F01D25/00Y02T50/10
Inventor 邓洪伟程荣辉尚守堂王群曹茂国张宗斌
Owner AECC SHENYANG ENGINE RES INST
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