Temperature-resistant acoustic liner acoustic characteristic test device and method
A technology of acoustic characteristics and test equipment, which is applied in the direction of measuring equipment, engine testing, jet engine testing, etc., to achieve the effect of convenient operation, perfect function and strong expandability
Inactive Publication Date: 2020-06-16
CHINA AIRPLANT STRENGTH RES INST
View PDF4 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The purpose of this application is to provide a temperature-resistant acoustic lining acoustic characteristics test device and method to solve at least one problem existing in the prior art
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] In order to make the purpose, technical solution and advantages of the application more clear, the technical solution in the embodiment of the application will be described in more detail below in conjunction with the drawings in the embodiment of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the application. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application. Embodiments of the present application will be described in detail below in conjunction with th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the field of acoustic tests, and particularly relates to a temperature-resistant acoustic liner acoustic characteristic test device and a temperature-resistant acoustic lineracoustic characteristic test method. The temperature-resistant acoustic liner acoustic characteristic test device comprises an annular acoustic test platform, an acoustic liner test piece, an air supply unit, a heating unit, a noise simulation unit and an acoustic acquisition and analysis unit, wherein the annular acoustic test platform is a platform used for providing a stable incoming flow environment, installing a noise simulation unit, installing a temperature-resistant acoustic liner used for a test and testing an acoustic mode; the air supply unit is used for simulating tangential incoming flow conditions of an outer duct of the engine; the heating unit is used for simulating a radiation heating environment of an engine core engine to realize heating of the inner surface of the acoustic liner; the noise simulation unit is used for generating a noise source of fan noise characteristics required by the test; and the acoustic acquisition and analysis unit is used for acquiring a sound pressure signal in the annular cavity. The temperature-resistant acoustic liner acoustic characteristic test device can simulate the application environment of the outer duct acoustic liner of theengine, and conduct the acoustic liner acoustic characteristic test considering the tangential incoming flow and the acoustic liner temperature gradient influence for the temperature-resistant acoustic liner.
Description
technical field [0001] The application belongs to the field of acoustic testing, in particular to a device and method for testing the acoustic characteristics of a temperature-resistant acoustic lining. Background technique [0002] Aeroengine noise is the main noise source of aircraft, mainly including fan noise, combustion noise, turbine noise and jet flow noise, among which fan noise is the main noise source of the engine, and laying acoustic lining on the engine nacelle wall is the most effective way to suppress fan noise One of the methods. [0003] In order to verify the performance of the engine acoustic lining, the noise environment of the engine fan is generally simulated by impeller fans or speaker arrays, and the acoustic lining is laid on the wall of the pipeline, and the sound mode and far-field directivity in the pipeline are tested under two conditions of the silent lining and the acoustic lining. parameters to study whether the noise reduction effect of the ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/14G01M15/02
CPCG01M15/14G01M15/02
Inventor 霍施宇燕群徐健薛东文黄太誉高翔
Owner CHINA AIRPLANT STRENGTH RES INST