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Planar cascade trailing edge noise identification and measurement method and device

A measurement method and technology of measurement device, which are applied in measurement device, electric device, radio wave measurement system, etc., to achieve the effect of reliable experimental process, convenient and reliable installation method, and solving the effect of receiving signal phase change

Inactive Publication Date: 2021-01-01
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] In view of the above-mentioned problems and technical difficulties in the current experimental measurement of the noise of the plane cascade, this invention patent discloses "an acoustic measurement device for the noise test of the plane cascade of the turbine". This measurement method and device can measure the noise of the cascade trailing edge identify

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  • Planar cascade trailing edge noise identification and measurement method and device
  • Planar cascade trailing edge noise identification and measurement method and device
  • Planar cascade trailing edge noise identification and measurement method and device

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Experimental program
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Embodiment Construction

[0027] see figure 1 — Figure 4 , in the experiment, use the installation socket (such as image 3 ) to fix the microphone on the linear array support device (such as figure 2 ), adjust the supporting device so that the relative position of the linear array and the trailing edge of the planar cascade blade satisfies figure 1 Require. Afterwards, the experimental data is collected and processed by the CLEAN-SC algorithm to obtain the noise recognition result of the cascade trailing edge.

[0028] Technical scheme of the present invention comprises:

[0029] 1. The overall experimental measurement plan of "a method and device for identifying and measuring noise at the trailing edge of a plane cascade"

[0030] The schematic diagram of the overall experimental technical scheme of the invention "a method and device for identifying and measuring noise at the trailing edge of a plane cascade" is attached figure 1 shown.

[0031] Such as figure 1 As shown, the test section o...

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Abstract

The invention relates to a planar cascade trailing edge noise identification and measurement method and device, which can conveniently adjust the relative positions of a microphone array and a planarcascade by adjusting a phase-difference-free total-reflection linear array support body device in a semi-anechoic chamber so as to adapt to the identification and measurement requirements of differentcascade sound sources. The position of a microphone mounting clamping seat on the linear array body in the support body can be adjusted to optimize the layout of the microphone array and improve thesound source identification precision; the invention discloses a plane cascade trailing edge noise identification and measurement method and device to solve the problem of microphone received signal phase change caused by semi-anechoic chamber ground reflection, and accurately realize microphone array beam forming; and due to the convenient and reliable microphone array installation mode, the microphone can be stably kept at a fixed measurement position in a high-speed airflow blowing experiment, and the experiment process is reliable, simple and practical.

Description

technical field [0001] The invention belongs to the field of experimental aeroacoustics in the research fields of aeroacoustics and aeroacoustics, and relates to a method and device for identifying and measuring noise at the trailing edge of a plane cascade. Background technique [0002] With the continuous increase of the bypass ratio of aero-engines, the jet noise of aero-engines has been significantly reduced. At present, the noise of aero-turbines (fans, compressors, turbines) has become the main noise source of aero-engines, and the main noise sources of aero-turbines are distributed At the leading edge and trailing edge of the turbine blade, the plane cascade experiment is an important experimental method for the study of turbine aerodynamics and noise. Therefore, the experimental measurement method is used to test the blade trailing edge noise of the turbine plane cascade. Measurement is of great value for the research of aeroengine noise. [0003] However, the simul...

Claims

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Application Information

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IPC IPC(8): G01M15/14G01M15/02G01H11/06G01S5/04
CPCG01M15/14G01M15/02G01H11/06G01S5/04
Inventor 卯鲁秦纪良黎霖向康深同航乔渭阳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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