Self-displacement buffer type shock wind tunnel

Abstract

The invention discloses a self-displacement buffer type shock wind tunnel, which includes a tunnel body and a buffer device for buffering the tunnel body. The buffer device includes at least one buffer seat including a seat body, a buffer ring and an elastic connection line; the buffer ring is fixedly arranged on the seat body by the elastic connection line; and the buffer ring coaxially sleeve the outer side of the tunnel body. Two limiting part for limiting the two ends of the buffer ring are arranged at the tunnel body; and the buffer ring is used for buffering the tunnel body when the tunnel body makes axial movement. Therefore, the axial impact force of the pulse wind tunnel can be buffered and thus the axial displacement after the impact force applying can be reduced or restored, sothat the operation and maintenance costs of the wind tunnel are reduced.

Description

technical field [0001] The invention relates to the technical field of ground wind tunnel experimental equipment for high-speed aircraft, in particular to a self-displacement buffer shock wave wind tunnel. Background technique [0002] Shock wave wind tunnel refers to a wind tunnel that first uses shock waves to compress the experimental gas, and then uses the steady expansion method to generate hypersonic experimental airflow. It consists of a shock tube and the main components of the wind tunnel such as the nozzle connected to it and the experimental section. The shock wave wind tunnel uses the high-pressure gas stored in the driving section to forcefully break through the stainless steel diaphragm between the driving section and the driven section, forming an unsteady incident shock wave in the driven section, compressing the experimental gas in the driven section, so that To achieve the high temperature and high pressure conditions required for test simulation. Due to ...

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Problems solved by technology

There are also various problems in this buffering method. Since the running time of the shock wave wind tunnel is extremely short, the contact between the heavy object and one end of the tunnel is also a rigid connection. The heavy object is impacted and the state changes from static to moving. , the instantaneous impact force received is also extremely large, and this method will also damage the heavy object or the cave body, and because the reaction process of the experimental gas in the cave is complicated, the high-pressure gas will continue to rub against the cave body, which will affect the diaphragm after impact. The effect is also irregular, so the high-pressure gas is easy to generate a certain torsional force on the cave body after the impact reaction. Therefore, how to buffer the torsion of the cave body and ensure the initial state of its angle is also very important

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