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Multi-scale simulation analysis method for propeller noise

A simulation analysis and propeller technology, applied in the field of noise simulation analysis

Active Publication Date: 2020-05-12
上海索辰信息科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditionally, experiments are used to measure propeller noise in China, supplemented by empirical formulas. Few simulation methods can effectively realize complex propeller noise simulation.

Method used

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  • Multi-scale simulation analysis method for propeller noise
  • Multi-scale simulation analysis method for propeller noise
  • Multi-scale simulation analysis method for propeller noise

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] Such as figure 1 As shown, this embodiment provides a multi-scale simulation analysis method for propeller noise, which includes the following steps:

[0028] Step 101. Based on the basic theories of aeroacoustics and flow acoustics, carry out dimensional analysis, asymptotic analysis, statistical analysis and correlation analysis on ...

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Abstract

The invention discloses a multi-scale simulation analysis method for propeller noise. The method comprises performing dimension analysis, progressive analysis, statistical analysis and correlation analysis on the noise to obtain a noise expression; performing Fourier transform on the noise expression and rewriting the noise expression in combination with a Green function; performing physical modeling of the propeller noise based on the rewritten noise expression and a physical process of the propeller noise to obtain a modeling model; dividing each single blade of the propeller into n parts along the axial direction or the radial direction, wherein n is initially 1; analyzing each parameter in the modeling model corresponding to each part, and calculating a far-field noise spectrum function of each part; calculating a far-field noise spectrum function of a single blade; and calculating an error value between the far-field noise spectrum function of the single blade and the far-field noise spectrum function obtained by a test, if the error value is greater than a set value, re-dividing the blade area for calculation, and otherwise, taking the modeling division process as the propeller noise simulation analysis method of the blade configuration and the blade number of the blades.

Description

technical field [0001] The invention relates to the technical field of noise simulation analysis, in particular to a multi-scale simulation analysis method for propeller noise. Background technique [0002] At present, the noise simulation analysis technology mainly adopts two methods of empirical formula and numerical simulation. Especially in the last ten years, general-purpose commercial acoustic software has been popular in China for numerical simulation at the macro scale. Numerical simulation algorithms such as the finite element and boundary element method are used for the middle and low frequency bands, and the statistical energy method is used for the middle and high frequency bands. The numerical calculation method adopted by the existing general commercial software has been able to solve some noise simulation problems at the component level, but it does not consider the noise problem at the micro scale, and it is difficult to carry out system-level noise simulatio...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/10
CPCY02T90/00
Inventor 曾奇陈灏王佳飞
Owner 上海索辰信息科技股份有限公司
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