Premium
The Noise Prediction Model SATIN
Author(s) -
Ostertag J.,
Wagner S.
Publication year - 2003
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200310185
Subject(s) - turbulence , turbulence kinetic energy , noise (video) , k epsilon turbulence model , physics , isotropy , k omega turbulence model , field (mathematics) , aeroacoustics , near and far field , reynolds averaged navier–stokes equations , computational physics , mechanics , statistical physics , acoustics , optics , sound pressure , mathematics , computer science , image (mathematics) , artificial intelligence , pure mathematics
This paper presents the noise prediction model SATIN (Statistical Approach to Turbulence Induced Noise) which is based on Lighthill's acoustic analogy. It allows to predict both, the far‐field noise radiation as well as near‐field wall‐pressure fluctuations. Far‐field noise radiation may result from the scattering of wall‐pressure fluctuations at geometrical discontinuities and is therefore important for many practical problems. Within this paper, we focus on the calculation of far‐field noise radiation. The required input values of SATIN are local properties of turbulence, namely the turbulent kinetic energy and the integral length scale which can be obtained by steady solutions of the Reynolds‐averaged Navier‐Stokes equations with a two equation turbulence model. It is assumed that the turbulence is axisymmetric and homogenous, which is taken into account by introducing two anisotropy parameters. The validation of SATIN is done for trailing‐edge noise originating from a thin flat plate using measurements of a phased array. As expected, the anisotropic formulation of SATIN improves the prediction quality considerably compared to isotropic turbulence.