High-speed wind tunnel microwave damage test device

Abstract

The invention discloses a high-speed wind tunnel microwave damage test device. A flat plate model is installed in the wind tunnel test section along the airflow, and a microwave source, a high-speed camera and a thermal infrared imager are installed outside the observation window on one side of the wind tunnel test section; incident microwaves emitted by the microwave source are fed into the windtunnel test section through the circulator and the coupler in sequence and then irradiate the surface of the flat plate model; wave-transmitting glass is embedded in the center of the surface of the flat plate model, an open waveguide is installed on the back face of the wave-transmitting glass, the open waveguide is closed up on a directional coupler, and the directional coupler is connected witha waveguide coaxial converter. A microwave absorption protective cover which is sleeved outside the open waveguide and is coaxial with the open waveguide is also arranged on the back surface of the flat plate model; an attenuator, a detector, an oscilloscope and a computer are mounted on the other side outside the wind tunnel test section; and front and rear reflection microwave absorption platearrays are respectively arranged at the front and rear parts of the flat plate model. The device can simulate the microwave temperature rise effect and the microwave damage characteristic of the wave-absorbing material under the condition of a real flow field in real time.

Description

technical field [0001] The invention belongs to the technical field of high-speed wind tunnel tests, and in particular relates to a high-speed wind tunnel microwave damage test device. Background technique [0002] High-power microwave weapons are the nemesis of stealth fighters, which is mainly caused by the design characteristics of stealth fighters themselves. First of all, the stealth absorbing materials commonly used by stealth fighters include special graphite honeycomb materials and resin polymer materials. The working principle of "stealth materials" is to convert radar waves into heat energy and emit it to avoid reflection. At the same time, in order to further enhance the stealth effect, all stealth fighters are sprayed with a rather thick layer of radar absorbing material. The working principle of this absorbing material is basically the same as that of "stealth material". Due to the extensive use of absorbing materials, the U.S. stealth fighter has a very good l...

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Problems solved by technology

Existing microwave experiments are mainly carried out in an open environment or microwave anechoic chamber, without considering the effects of convective heat transfer caused by real airflow

[0008] At present, the Chinese patent literature database has published the application number 201911130858.9, the invention name is "A high-speed wind tunnel kilowatt level microwave damage test device", and the application number is 201911130870.X, the invention name is "A high-speed wind tunnel megawatt Quantitative Microwave Damage Test Device", these two invented microwave damage test devices can simulate the influence of real airflow on microwave damage, but it is necessary to further strengthen the protection against escaped microwaves

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