Supersonic wind tunnel velocity field calibration and measurement total pressure tube vibration suppression device

Abstract

The invention discloses a supersonic wind tunnel velocity field calibration and measurement total pressure tube vibration suppression device comprising a connecting seat and four supporting mechanisms. The connecting seat is provided with a first axis and comprises two connecting ends distributed on the axis; the supporting mechanisms comprise supporting sleeves, supporting rods and first elastic components; one ends of the supporting sleeves are connected to the connecting seat, the other ends are provided with openings, the supporting rods are sleeved with the supporting sleeves, the free ends of the supporting rods extend out of the openings, and the first elastic components are arranged in the supporting sleeves and provide the applied force which is parallel to the length of the supporting sleeves and which orient to the outer sides of the supporting sleeves; the supporting mechanisms are arranged on the connecting seat and are distributed in a radiating manner corresponding to the axis. The vibration of the total pressure tube can be suppressed effectively, the rigidity of a total pressure tube test system is improved, and the testing accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of wind tunnels, in particular to a vibration suppressing device for supersonic wind tunnel velocity field calibration and measurement of total pressure exhaust pipes, which can effectively suppress the vibration of total pressure exhaust pipes and improve test accuracy when used for supersonic wind tunnel velocity field calibration and measurement And improve the stiffness of the test device. Background technique [0002] When the supersonic wind tunnel is debugging the velocity field, since the disturbance in the supersonic flow field propagates backward in the Mach cone, the calibration of the supersonic velocity field requires the calibration of the Mach number of the section. The calibration of the supersonic Mach number is carried out by the total pressure exhaust pipe, and the total pressure exhaust pipe is mostly in the shape of a "ten". [0003] When calibrating the velocity field in a supersonic w...

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Problems solved by technology

When the wind tunnel is started, because the total pressure exhaust pipe is impacted by the air flow, the total pressure exhaust pipe shakes violently, and the connecting rods will be deformed at the matching part of the angle of attack mechanism. In severe cases, the bent frame cannot move forward and backward, and the test cannot be carried out; When the flow field is stable, the vibration of the total pressure exhaust pipe will also affect the test accuracy; the total pressure exhaust pipe is shaken violently by the impact of the air flow, and the connecting rod is affected by the bending moment

With the forward movement of the total pressure bent frame, the bending moment on the connecting rod also increases correspondingly. When it is severe, the connecting rod will be damaged, affecting the test accuracy and causing damage to the test equipment, etc.

[0005] Due to the above difficulties, before the present invention, there was no mature method to suppress the vibration of the total pressure exhaust pipe when the supersonic wind tunnel flow field was started and stabilized.

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