Measuring device for shearing strength between ice layer and solid material on basis of experimental section of icing wind tunnel

Abstract

The invention discloses a measuring device for the shearing strength between an ice layer and a solid material on the basis of an experimental section of an icing wind tunnel. The measuring device comprises connecting plates arranged on the upper tunnel wall and the lower tunnel wall of the wind tunnel, wherein an experimental inner model is arranged between the two connecting plates; an experimental outer model is sheathed into the surface of the experimental inner model; the two ends of the experimental inner model are respectively of boss structures; the convex parts penetrate through through holes on the connecting plates and are fixedly connected with facilities at the outer parts of the connecting plates; and a window is arranged on the surface of the experimental outer model and faces the blowing direction of the experimental section of the wind tunnel. The measuring device disclosed by the invention has the advantages that the influence rules of different icing meteorological input conditions on the ice layer and the influence rules of the material characteristics on the adhesion characteristics of the ice layer and the solid wall surface can be realized by utilizing the icing meteorological environment of an experimental platform and the experimental section of the icing wind tunnel and combining experimental methods such as solid mechanics and fracture mechanics and the like with relevant technologies.

Description

Technical field [0001] The invention relates to the field of icing wind tunnel force measurement test, and also to the field of solid mechanics test, in particular to a method and device for measuring the shear strength of an icing wind tunnel experimental section. Background technique [0002] Aircraft icing is a widespread physical phenomenon in flight practice, and it is one of the main hidden dangers that cause flight safety accidents. When the aircraft is flying under the icy weather conditions where the ambient temperature is lower than the freezing point or near the freezing point, the super-cooled water droplets in the atmosphere hit the surface of the aircraft, and the icing phenomenon is easily on the wing, tail, rotor, intake duct, etc. Windshield, radome, instrument sensors and other parts of the surface. The icing of the aircraft not only increases the weight of the aircraft, but also destroys the aerodynamic shape of the surface of the aircraft, changes the flow fi...

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Problems solved by technology

However, the biggest problem with its device is that the frozen experimental model must be removed from the icing wind tunnel experiment section to a similar freezing environment such as a cold storage, and the shear strength of the model must be measured using the solid mechanics tensile device in this low-temperature environment. First of all, the similar cold storage environment is not the icing meteorological environment of the icing experiment, and the environmental parameters such as ambient temperature and humidity will be different. The difference in the experimental environmental parameters will greatly affect the ice and ice. The shear strength measurement results between solid materials; secondly, if the icing experimental model is moved out of the experimental section of the icing wind tunnel, it is possible that the ice layer will be destroyed during the process of moving the experimental model, which will also greatly The data on the influence of the shear strength between the ice layer and the solid material

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