Sensing mechanism of two-dimensional airfoil model

Abstract

The invention relates to a sensing mechanism of a two-dimensional airfoil model. The sensing mechanism comprises a pressure sensor group, a plurality of first conduits, a second conduit and a cavity,wherein the pressure sensor group is vertically fixed in a mounting hole in a surface of the two-dimensional airfoil model, and a pressure measuring surface of each pressure sensor in the pressure sensor group is vertical to the surface of the two-dimensional airfoil model; a plurality of mounting holes perpendicular to the surface of the two-dimensional airfoil model are formed in the surface ofthe two-dimensional airfoil model; the cavity is fixed in the two-dimensional airfoil model; reference pressure ends of the pressure sensors in the pressure sensor group are connected to the cavity through the first conduits, and the plurality of pressure sensors in the pressure sensor group are in one-to-one correspondence with the plurality of first conduits; the cavity is connected with the first end of the second conduit, and the second end of the second conduit is arranged in the atmosphere outside the two-dimensional airfoil model. According to the mechanism disclosed in the invention, measurement precision of the two-dimensional airfoil surface pressure distribution can be improved.

Description

technical field [0001] The invention relates to the field of aerodynamics, in particular to a sensing mechanism of a two-dimensional airfoil model. Background technique [0002] The rotor is the key component of the helicopter, which can provide the helicopter with lift, thrust, and force and moment required for maneuvering flight. The aerodynamic analysis of the rotor is the core issue of helicopter aerodynamics. [0003] Two-dimensional airfoil surface pressure measurement in a wind tunnel is one of the main means to study rotor aerodynamics. However, the pressure measurement device used in the existing experimental equipment mainly uses pitot tubes. When using pitot tubes to measure pressure, there are the following disadvantages : [0004] The pitot tube itself will disturb the flow field, which will reduce the measurement accuracy, and the error will be more obvious when measuring the dynamic pressure. [0005] When using the Pitot tube for experiments, theoretically,...

AI Technical Summary

Problems solved by technology

But in actual application, the air bubbles are not easy to get rid of. Once the lower end is out of the water, the air bubbles need to be re-exhausted after entering. The process is more cumbersome.

In addition, it is not easy to realize the flow velocity direction at the measuring point.

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