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Electromagnetic scattering test device and test method for aeroengine nozzle cavity

A test device and electromagnetic scattering technology, which is applied in the direction of electromagnetic field characteristics, can solve the problems of poor electromagnetic wave shielding effect on the outer wall surface, and achieve the effects of reduced test cost, convenient operation, and low processing difficulty

Inactive Publication Date: 2018-01-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

In "Experimental Research on Electromagnetic Scattering Characteristics and Suppression Technology of Straight Tube Oblique-cut Square-to-Circle Inlet" (Acta Aeronautical Sciences, 1999, Vol. 20, No. 3, pp. 205-210), the The method of pasting the absorbing material on the outer surface of the model weakens the electromagnetic wave reflection on the outer wall surface, and also has the defect of poor electromagnetic wave shielding effect on the outer wall surface

Method used

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  • Electromagnetic scattering test device and test method for aeroengine nozzle cavity
  • Electromagnetic scattering test device and test method for aeroengine nozzle cavity

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Embodiment Construction

[0021] This embodiment is an electromagnetic scattering test device and test method for an aeroengine nozzle cavity.

[0022] Refer to figure 1 , figure 2 , Engine nozzle cavity electromagnetic scattering test device, adopts a pointed cone absorbing material on the outer wall of the test device body to carry out the electromagnetic scattering test of the nozzle cavity, the pointed cone absorbing material on the outer wall can absorb most In the electromagnetic test, the electromagnetic wave reflection on the outer wall of the nozzle is effectively shielded, and the electromagnetic reflection on the metal outer wall of the nozzle is eliminated, and reliable electromagnetic scattering data of the nozzle cavity is obtained. The test data can reliably reflect the nozzle cavity The electromagnetic scattering characteristics.

[0023] In this embodiment, the engine nozzle cavity electromagnetic scattering test device consists of a supporting frame 1, an upper frame 2, a wave-absorbing ...

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Abstract

The invention discloses an electromagnetic scattering test device and a test method for the nozzle cavity of an aero-engine. The tapered wave-absorbing material on the wall can absorb most of the radar waves, effectively shield the electromagnetic wave reflection on the outer wall of the nozzle model in the electromagnetic test, eliminate the electromagnetic reflection on the metal outer wall of the nozzle model, and obtain a reliable nozzle cavity The test data can accurately reflect the electromagnetic scattering characteristics of the nozzle cavity. The test device has simple structure, low processing difficulty, low cost, convenient operation, and can be reused, which greatly reduces the cost of electromagnetic scattering test of nozzle cavity, and the test method can obtain accurate and reliable test data; electromagnetic scattering test device and test method It is of great significance to study the electromagnetic scattering of the nozzle cavity.

Description

Technical field [0001] The invention relates to the technical field of aeroengine electromagnetic stealth, in particular to an electromagnetic scattering test device and a test method for an aeroengine nozzle cavity. Background technique [0002] An important feature of the fifth-generation fighter is its stealth capability, and the aero engine nozzle as an electrical large cavity structure is a strong radar scattering source for the aircraft. The use of low radar scattering aero engine nozzles can improve the stealth ability of the aircraft. Important role. Experimental methods are mainly used to study the electromagnetic scattering characteristics of aero-engine nozzles, and the experimental results can guide the design and improvement of aero-engine nozzles. [0003] From the publicly published literature at home and abroad, there is no discovery about the electromagnetic scattering test device and method of the aero-engine nozzle cavity, but there are research data about the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08
Inventor 王俊琦杨青真彭彬高翔
Owner NORTHWESTERN POLYTECHNICAL UNIV
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