Pressure measurement device for wing elasticity shrinkage similarity model of large-size transport plane

Abstract

A pressure measurement device for wing elasticity shrinkage similarity model of a large-size transport plane belongs to the technical field of wind tunnel test. The pressure measurement device employsa pressure measurement pipe bracket formed by 3D printing, an upper surface and a lower surface are completely same as local wings of a part of which pressure is needed to be measured of a skin, theupper surface and the lower surface are pasted onto the skin and a wing beam by resin, a pressure measurement hose is connected with a pressure measurement steel pipe, the pressure measurement steel pipe is arranged in the pressure measurement pipe bracket and is fixed by a top block, half-cylinder bulges are arranged at pressure measurement positions of an upper surface and a lower surface of thepressure measurement pipe bracket and are matched with pressure measurement holes of a skin surface, the pressure measurement steel pipe extends out of the pressure measurement holes in the skin surface through a pipe groove of the pressure measurement pipe on the pressure measurement pipe bracket, and a pipe axis of the pressure measurement steel pipe is required to be perpendicular to the skinsurface. The pressure measurement device is simple to install, the pressure measurement pipe bracket is light in structural mass, obvious mass and rigidity cannot be added to the model, steady pressure distribution measurement of an upper surface and a lower surface of the model can be achieved in static aerodynamic elastic tunnel experiment, and the problem that the pressure measurement pipe is difficult to install in a wind elasticity similarity model is solved.

Description

technical field [0001] The invention relates to a pressure measuring device used for a large-scale transport aircraft wing elastic reduction ratio similar model, which belongs to the technical field of wind tunnel tests. Background technique [0002] In the static aeroelastic wind tunnel test, it is generally necessary to measure the steady pressure distribution of the model. The pressure measurement results can be used to test the reliability of the calculation method and serve as a reference or basis for improving the calculation method. A reasonable and effective wind tunnel test model pressure measurement system is an important basis for obtaining reliable research data. In order to ensure the validity of the pressure measurement results, the axis of the piezometric tube in the wind tunnel test model must be strictly perpendicular to the skin surface, and the deflection angle should be within plus or minus 1 degree, which is difficult to achieve in the actual production...

AI Technical Summary

Problems solved by technology

In order to ensure the validity of the pressure measurement results, the tube axis of the pressure measurement tube in the wind tunnel test model must be strictly perpendicular to the skin surface, and the deflection angle should be within plus or minus 1 degree, which is difficult to achieve in the actual production of the model

Moreover, models with similar wing elastic ratios generally have low stiffness and large deformation, so it is impossible to directly install pressure measuring tubes.

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