Vibration suppression device for supersonic wind tunnel velocity field calibration and measurement of total pressure exhaust pipe

Abstract

The invention discloses a shake suppression device for calibrating the velocity field of a supersonic wind tunnel to measure the total pressure discharge pipe, comprising: a connecting seat, which has an axis, and the connecting seat has two connecting ends distributed on the axis; The support mechanism includes a support sleeve, a support rod and a first elastic member, wherein one end of the support sleeve is connected to the connecting seat, and the other end has an opening, and the support rod is sleeved on the support sleeve and the free end of the support rod protrudes from the opening, the first elastic member is arranged inside the support sleeve to provide the support rod parallel to the length direction of the support sleeve and The force directed to the outside of the support sleeve; wherein at least four support mechanisms are arranged on the connection seat and are radially distributed relative to the axis. The invention can effectively suppress the vibration of the total pressure discharge pipe, enhance the rigidity of the total pressure discharge pipe test system, and improve the test accuracy.

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...

AI Technical Summary

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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