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

Sylvain Morilhat (1) , François Chedevergne (1) , Frank Simon (1)

1 DMPE, ONERA, Université de Toulouse [Toulouse]

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.

Mots clés: POISSON EQUATION; ACOUSTICS; WAVE; FLOW; NOISE; BOUNDARY LAYER TURBULENCE; PRESSURE

Mots clés: ECOULEMENT; BRUIT; TURBULENCE; PRESSION; TURBULENCE COUCHE LIMITE; FLUCTUATION; RESOLUTION; EQUATION DE POISSON; ACOUSTIQUE; ONDE

Domaines: Mécanique des fluides [physics.class-ph]; Milieux fluides et réactifs

Sylvain Morilhat, François Chedevergne, Frank Simon. A Unified Methodology to Evaluate the Radiated Noise Due to Turbulent Boundary Layer Flows. Journal of Fluids Engineering, 2018, 141 (6), pp.061201-1 - 061201-11. ⟨10.1115/1.4041611⟩. ⟨hal-01999610⟩