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Axisymmetric double-engine low-scattering carrier for RCS testing and application method

Axisymmetric, low-scattering technology, applied in the direction of re-radiation, radio wave reflection/re-radiation, measuring devices, etc., can solve the problems of inaccuracy and difficult testing, and achieve the effect of reducing radar echoes

Pending Publication Date: 2021-09-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Claims
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AI Technical Summary

Problems solved by technology

The integrated design of the dual-engine carrier and the axisymmetric nozzle solves the problem of difficult and inaccurate test of the dual-nozzle backward RCS experiment

Method used

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  • Axisymmetric double-engine low-scattering carrier for RCS testing and application method
  • Axisymmetric double-engine low-scattering carrier for RCS testing and application method
  • Axisymmetric double-engine low-scattering carrier for RCS testing and application method

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Embodiment Construction

[0041] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0042] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

[0043] refer to Figure 1-6 As shown, an ax...

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Abstract

The invention discloses an axisymmetric double-engine low-scattering carrier for RCS testing and an application method, and belongs to the field of RCS testing of aero-engines. The axisymmetric double-engine low-scattering carrier comprises a carrier body with a smooth curved surface in appearance, wherein the carrier body is divided into a carrier front half section and a carrier rear half section in the axial direction; the carrier is in the shape of a flat cone; two ports are symmetrically formed in the tail end of the rear half section of the carrier by taking the central axis as the center axis and are used for mounting a double-engine spray pipe during an electromagnetic test; and a tail cone is arranged between the two ports, and horizontal tails are symmetrically arranged on the outer sides of the two ports. Horizontal tails on the two sides and a tail cone in the middle are introduced to simulate the layout of an aircraft afterbody, the interior of a nozzle cavity is shielded when radar waves enter from the side direction, and radar echoes are reduced. In addition, the relation between single-engine and double-engine backward RCSs can be researched by testing the scattering characteristics of the double-nozzle backward radar.

Description

technical field [0001] The invention belongs to the field of RCS testing of aero-engines, and in particular relates to an axisymmetric double-engine low-scattering carrier for RCS testing and an application method. Background technique [0002] Aircraft radar stealth is currently an important research direction in the design of a new generation of fighters. As an important part of the exhaust system, the nozzle is easy to generate large echoes along the incident direction after multiple reflections after the incident electromagnetic wave due to its cavity structure, and is currently the main scattering source in the aircraft's backward direction. Therefore, the stealth design of the aircraft nozzle is very important to improve the radar stealth characteristics of the aircraft. [0003] For nozzle stealth design, there are mainly numerical simulation methods and experimental test methods, among which the experimental test method is mainly to test the scattering from the insi...

Claims

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Application Information

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IPC IPC(8): G01S7/40G01S7/02G01S13/88
CPCG01S7/4004G01S7/02G01S13/88
Inventor 贺榆波杨青真张宗斌施永强王旭飞向惠敏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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