Attenuation of Slat Trailing Edge Noise Using Acoustic Liners

Application of Passive Porous Treatment to Slat Trailing Edge Noise

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Computation of trailing-edge noise at low Mach number using LES and acoustic analogy

Statistical Estimation of Turbulent Trailing Edge Noise

A new computational aeroacoustic model suitable for the prediction of turbulent airfoil trailing edge noise is presented. The method (known as the RANS based Statistical Noise Model or RSNM) combines numerically generated, mean turbulence information with a Green’s function for a semi-infinite half-plane to generate a far-field acoustic auto-spectrum. As a preliminary application of the method,...

AIAA 99-1802 Computational Aeroacoustic Analysis of Slat Trailing-Edge Flow

An acoustic analysis based on the Ffowcs Williams and Hawkings equation was performed for a high-lift system. As input, the acoustic analysis used unsteady ow data obtained from a highly resolved, time-dependent, Reynolds-averaged Navier-Stokes calculation. The analysis strongly suggests that vor-tex shedding from the trailing edge of the slat results in a high-amplitude, high-frequency acousti...

Computation of Trailing Edge Noise with a Discontinuous Galerkin Method

Trailing edge noise of a semi-infinite, thin, flat plate situated in low Mach number flow is computed in two spatial dimensions. The Acoustic Perturbation Equations (APE), which are employed as governing equations, are discretized via a Discontinuous Galerkin Method (DGM). Results are compared with theory and Finite Difference (FD) computations. Next to the radiated sound field, special attenti...