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Wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristics

A noise coupling and wind tunnel experiment technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as insufficient research capabilities

Active Publication Date: 2019-09-27
INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a wind tunnel experimental simulation method for the coupling characteristics of cavity flow-induced vibration and flow-induced noise, so as to solve the deficiency of the prior art in the research ability of cavity flow-induced vibration and flow-induced noise

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  • Wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristics
  • Wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristics
  • Wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristics

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Embodiment 1

[0085] The present invention is realized through the following technical scheme, the wind tunnel experimental simulation method of the coupling characteristics of flow-induced vibration and flow-induced noise of the cavity, the equation analysis method is used to establish the control equation and boundary conditions of the coupling characteristics of flow-induced vibration and flow-induced noise of the cavity, and the Dimensional physical quantity parameters are transformed into similarity criterion data sets of dimensionless physical quantity parameters, and based on the similarity criterion data set, the wind tunnel experiment model design, the selection of flow conditions and the data correction of wind tunnel experiment results are carried out.

[0086] It should be noted that, through the above improvements, the theoretical basis for the wind tunnel experimental measurement and evaluation technology of flow-induced vibration and cavity flow-induced noise characteristics of...

Embodiment 2

[0088] This embodiment is further optimized on the basis of the above embodiments. Further, in order to better realize the present invention, the following steps are specifically included:

[0089] Step S1: Establish the key influencing parameter data set, characterization parameter data set and dimensionless parameter data set of the coupling characteristics of flow-induced vibration and flow-induced noise in the cavity; specifically, the following steps are included:

[0090] According to the prior knowledge of aerodynamics and aeroacoustics, analyze the key influencing parameters of the cavity flow-induced vibration and flow-induced noise; analyze the basic laws of cavity flow and structural vibration, and establish the key influencing parameter data of the cavity fluid-solid coupling problem set; the key influencing parameter data set specifically includes geometric parameters representing the cavity, parameters representing the structure of the cavity and parameters repres...

Embodiment 3

[0152] This embodiment is further optimized on the basis of the foregoing embodiments, and the step S3 specifically includes:

[0153] Step S31: Establish a similarity criterion data set for the key influencing parameters of the coupling characteristics of flow-induced vibration and flow-induced noise in the cavity; specifically, according to the prior knowledge of the similarity principle, use the key influencing parameter data set and dimensionless parameters in step S1 The data set and the governing equations and boundary condition equations of the dimensionless parameter data set representing the coupling characteristics of flow-induced vibration and flow-induced noise in the cavity in step S2, establish a data set of similarity criteria for cavity geometric parameters, and a data set of similarity criteria for incoming flow conditions And the cavity structure parameter similarity criterion data set;

[0154] The cavity geometric parameter similarity criterion data set is ...

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Abstract

The invention relates to the crossing field of aerodynamics, experimental fluid mechanics, aeroacoustics and structural dynamics and discloses a wind tunnel experiment simulation method for cavity flow-induced vibration and flow-induced noise coupling characteristics. The method comprises the following steps of establishing a cavity flow-induced vibration and flow-induced noise coupling characteristic control equation and boundary conditions by using an equation analysis method; converting the physical quantity parameters with dimensions into a similarity criterion data set of the physical quantity parameters without dimensions, and performing wind tunnel experiment model design, incoming flow condition selection and wind tunnel experiment result data correction based on the similarity criterion data set. The defect of the research capability of the cavity flow-induced vibration and flow-induced noise coupling characteristic problem in the prior art is effectively overcome. Completeness of wind tunnel experiment simulation parameters, effectiveness of an experiment data correction method and wind tunnel experiment simulation precision are ensured. Mutual influence rules among experimental results are effectively obtained; and the influence of cavity structure vibration can be simulated, so that the wind tunnel experiment simulation capability of the cavity configuration aircraft part is improved.

Description

technical field [0001] The invention relates to the cross fields of aerodynamics, experimental fluid mechanics, aeroacoustics and structural dynamics, and specifically refers to a wind tunnel experimental simulation method for the coupling characteristics of cavity flow-induced vibration and flow-induced noise. Background technique [0002] Aircraft components with cavity configurations are ubiquitous in the aerospace field, such as aircraft landing gear compartments, buried weapon compartments, high-speed train compartment gaps, etc. This cavity configuration is helpful for improving the stealth ability of aircraft, enhancing maneuverability, and reducing flight resistance. etc. are of great significance. However, under the condition of high-speed incoming flow, the flow-induced noise environment inside the cavity is harsh, and the strong flow-induced noise load is likely to cause vibration of the solid-wall structure of the cavity, forming typical cavity flow-induced vibra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F2119/06G06F30/20Y02T90/00
Inventor 王显圣吴军强路波杨党国周方奇张征宇刘俊
Owner INST OF HIGH SPEED AERODYNAMICS OF CHINA AERODYNAMICS RES & DEV CENT
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