Method for manufacturing high-temperature speckles applied to hypersonic flight vehicle wind tunnel test

Abstract

The invention discloses a method for manufacturing high-temperature speckles applied to a hypersonic flight vehicle wind tunnel test. The method comprises the following steps: 1, manufacturing a speckle template on which sizes, number and location of speckles are randomly distributed; 2, treating the surface of a metal model for manufacturing speckles, removing metal chips or antirust oil layer onthe metal surface; 3, placing the speckle template on the metal model for manufacturing speckles to enable the speckle template to contact the maintaining surface of the metal model and keep stable;4, fixedly connecting the corrosion cathode of electrochemical corrosion equipment onto the metal model for manufacturing speckles, and soaking the corrosion head of the electrochemical corrosion equipment into a metal corrosion solution matched with the metal model, and taking out the corrosion head after the corrosion head is completely immersed; and finally, connecting the power supply of the electrochemical corrosion equipment, selecting the corrosion mode and corrosion voltage, and putting the corrosion head onto the speckle template for speckle treatment.

Description

technical field [0001] The invention relates to a speckle manufacturing method, which is applied to the deformation measurement of a hypersonic vehicle in a wind tunnel test, and belongs to an aerospace experiment method. Background technique [0002] The shape of future hypersonic vehicles is complex. Due to the interference of shock waves, etc., the heat flow distribution on the surface of the vehicle is very complicated, and it is accompanied by thermal deformation coupled with various factors. A very important goal of hypersonic vehicle shape design is to control the elastic deformation and thermal deformation of the vehicle within an allowable range, so the deformation measurement of the hypersonic vehicle during the wind tunnel test is particularly important. [0003] At present, the commonly used model deformation measurement method is image-based digital speckle correlation method, and the commonly used speckle in digital speckle correlation method mainly includes na...

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Problems solved by technology

Although the latter method is simple, it still has the same problem as the former, that is, both of them will cause unacceptable roughness on the surface of the specimen due to the principle of speckle production and the error of manual operation.

Therefore, it is not suitable for wind tunnel tests of hypersonic vehicles with high-speed and high-temperature airflow

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