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Jet stream acoustic lining protective panel

A technology of high-speed airflow and protective panels, applied in aerodynamic tests, measuring devices, instruments, etc., can solve the problems of airflow and sound field influence, affect the accuracy and reliability of data acquisition in wind tunnel tests, and achieve enhanced splicing strength , reduce the impact, reduce the effect of flow resistance

Active Publication Date: 2013-10-02
上海声望声学科技股份有限公司
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Problems solved by technology

[0004] In view of this, the present invention aims to provide a high-speed airflow acoustic lining panel to solve the impact of the installation of the acoustic sound-absorbing panel on the airflow and sound field due to the two-way open pressure method in the prior art, which affects the wind tunnel Technical issues such as accuracy and reliability of data collection during testing

Method used

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Embodiment Construction

[0016] Considering that in the prior art, in a high-speed airflow environment such as a wind tunnel, the two-way surface pressure splicing used to install and fix the sound-absorbing protective panel on the wall of the wind tunnel has seriously affected the sound-absorbing panel into a complete protective panel. The flow of airflow is prone to turbulence and increased wind noise, which in turn affects technical issues such as the accuracy of data collection in wind tunnel testing. This invention adopts a new process suitable for seam splicing under high-speed airflow, and abandons the two-way surface pressure method. , The open pressure splicing method is adopted in the direction along the high-speed air flow, and the dark pressure splicing method is used in the direction perpendicular to the high-speed air flow, thereby reducing the impact on the high-speed air flow and increasing the splicing strength.

[0017] In order to make the purpose and features of the present inventio...

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Abstract

The invention discloses a jet stream acoustic lining protective panel, which includes a plurality of acoustic panel absorbers, external pressing strips and hidden pressing strips, wherein first relative parallel edges of the acoustic panel absorbers are buckling edges, second relative parallel edges of the acoustic panel absorbers are straight edges; the adjacent buckling edges of the acoustic panel absorbers in the first direction are butted to form grooves; the hidden pressing strips are embedded in the grooves in a pressing manner; the adjacent straight edges of the acoustic panel absorbers in the second direction vertical to the first direction are butted; the external pressing strips are pressed and attached to the butted parts of the straight edges. The jet stream acoustic lining protective panel guarantees the splicing strength of splicing parts of the acoustic panel absorbers and the flatness to adapt to the jet flow environment, and abandons and changes the bi-directional external pressing manner into the hidden pressing technology in the direction vertical to the air flow to guarantee low flow resistance, thereby reducing the influence on airflow and sound field, and enhancing the splicing intensity of panels at the same time.

Description

technical field [0001] The invention relates to the technical field of acoustic noise reduction, and in particular to a high-speed airflow acoustic lining protection panel. Background technique [0002] A wind tunnel is generally called a wind tunnel test. According to the principle of relativity of motion, the model or object of the aircraft is fixed in the artificial environment on the ground, and the air flow is artificially created to simulate various complex flight states in the air to obtain test data. This is the "green channel" for the development and production of modern aircraft, missiles, and rockets. [0003] During the wind tunnel test, in order to reduce the wind noise of the wind tunnel itself and improve the accuracy and reliability of the wind tunnel test, an acoustic sound-absorbing surface is usually installed on the inner wall of the wind tunnel to reduce noise. In the prior art, the sound-absorbing protective surface is spliced ​​by multiple sound-abso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/04
Inventor 罗伟
Owner 上海声望声学科技股份有限公司
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