A Unified Methodology to Evaluate the Radiated Noise Due to Turbulent Boundary Layer Flows
| Autor: | Sylvain Morilhat, François Chedevergne, Frank Simon |
|---|---|
| Přispěvatelé: | ONERA / DMPE, Université de Toulouse [Toulouse], ONERA-PRES Université de Toulouse |
| Rok vydání: | 2018 |
| Předmět: |
Boundary layer turbulence
FLOW Computation Acoustics TURBULENCE COUCHE LIMITE 02 engineering and technology PRESSURE 01 natural sciences NOISE [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] 010305 fluids & plasmas Physics::Fluid Dynamics BOUNDARY LAYER TURBULENCE 0203 mechanical engineering ACOUSTICS 0103 physical sciences ECOULEMENT ONDE Physics 020301 aerospace & aeronautics Turbulence [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment Mechanical Engineering POISSON EQUATION PRESSION BRUIT FLUCTUATION Boundary layer Noise RESOLUTION ACOUSTIQUE WAVE TURBULENCE EQUATION DE POISSON Poisson's equation Structural acoustics |
| Zdroj: | Journal of Fluids Engineering Journal of Fluids Engineering, American Society of Mechanical Engineers, 2018, 141 (6), pp.061201-1-061201-11. ⟨10.1115/1.4041611⟩ |
| ISSN: | 1528-901X 0098-2202 |
| DOI: | 10.1115/1.4041611 |
| Popis: | International audience; For vibro-acoustic applications, a turbulent wall pressure fluctuations model was derived. The model is based on the resolution of the Poisson equation. The pressure is characterized in time and space through its spectrum in the pulsation wave-number domain. The developed model follows trends commonly observed using Corcos model in a large pulsation range but also shows new behaviours for low and high pulsations. The radiated noise due to turbulent wall pressure fluctuations is then computed in accordance with the form of the turbulent wall pressure spectrum. A specific computational methodology is proposed to perform the calculation without introducing limiting hypothesis on the radiated impedance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|