A Unified Methodology to Evaluate the Radiated Noise Due to Turbulent Boundary Layer Flows

被引：4

作者：

Morilhat, Sylvain ^{[1
]}

Chedevergne, Francois ^{[1
]}

Simon, Frank ^{[1
]}

机构：

[1] ONERA DMPE, 2 Ave E Belin, F-31000 Toulouse, France

来源：

JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME | 2019年 / 141卷 / 06期

关键词：

WALL-PRESSURE-FLUCTUATIONS; RANDOMLY EXCITED PANEL; WAVE-NUMBER APPROACH; SURFACE PRESSURE; SPECTRAL MODEL; AIRCRAFT; PREDICTION; SOUND; FIELD; CAA;

D O I：

10.1115/1.4041611

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

For vibro-acoustic applications, a turbulent wall pressure (TWP) fluctuations model was derived. The model is based on the resolution of Poisson's equation. The pressure is characterized in time and space through its spectrum in the frequency wave-number domain. The developed model follows trends commonly observed using Corcos model in a large frequency range but also shows new behaviors for low and high frequencies. The radiated noise due to TWP fluctuations is then computed in accordance with the form of the TWP spectrum. A specific computational methodology is proposed to perform the calculation without introducing limiting hypothesis on the radiated impedance.

引用

页数：11

共 24 条

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