Improvement of TNO type trailing edge noise models

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The paper describes an improvement of the so-called TNO model to predict the noise emission from aerofoil sections due to the interaction of the boundary layer turbulence with the trailing edge. The surface pressure field close to the trailing edge acts as source of sound in the TNO model. It is computed by solving a Poisson equation which includes flow turbulence cross correlation terms. Previously published TNO type models used the assumption of Blake to simplify the Poisson equation. This paper shows that the simplification should not be used. We present a new model which fully models the turbulence cross correlation terms. The predictions of the new model are in better agreement with measurements of the surface pressure and far field sound spectra. The computational cost of the new model is only slightly higher than the one of the TNO model, because we derived an analytical solution for the turbulence cross correlation terms.
Original languageEnglish
JournalEuropean Journal of Mechanics B - Fluids
Volume61
Pages (from-to)255-262
Number of pages8
ISSN0997-7546
DOIs
Publication statusPublished - 2017

Cite this

@article{61658b7a633448fc9a1ec72f66b31161,
title = "Improvement of TNO type trailing edge noise models",
abstract = "The paper describes an improvement of the so-called TNO model to predict the noise emission from aerofoil sections due to the interaction of the boundary layer turbulence with the trailing edge. The surface pressure field close to the trailing edge acts as source of sound in the TNO model. It is computed by solving a Poisson equation which includes flow turbulence cross correlation terms. Previously published TNO type models used the assumption of Blake to simplify the Poisson equation. This paper shows that the simplification should not be used. We present a new model which fully models the turbulence cross correlation terms. The predictions of the new model are in better agreement with measurements of the surface pressure and far field sound spectra. The computational cost of the new model is only slightly higher than the one of the TNO model, because we derived an analytical solution for the turbulence cross correlation terms.",
author = "Andreas Fischer and Franck Bertagnolio and {Aagaard Madsen}, Helge",
year = "2017",
doi = "10.1016/j.euromechflu.2016.09.005",
language = "English",
volume = "61",
pages = "255--262",
journal = "European Journal of Mechanics B - Fluids",
issn = "0997-7546",
publisher = "Elsevier",

}

Improvement of TNO type trailing edge noise models. / Fischer, Andreas; Bertagnolio, Franck; Aagaard Madsen , Helge.

In: European Journal of Mechanics B - Fluids, Vol. 61, 2017, p. 255-262.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Improvement of TNO type trailing edge noise models

AU - Fischer, Andreas

AU - Bertagnolio, Franck

AU - Aagaard Madsen , Helge

PY - 2017

Y1 - 2017

N2 - The paper describes an improvement of the so-called TNO model to predict the noise emission from aerofoil sections due to the interaction of the boundary layer turbulence with the trailing edge. The surface pressure field close to the trailing edge acts as source of sound in the TNO model. It is computed by solving a Poisson equation which includes flow turbulence cross correlation terms. Previously published TNO type models used the assumption of Blake to simplify the Poisson equation. This paper shows that the simplification should not be used. We present a new model which fully models the turbulence cross correlation terms. The predictions of the new model are in better agreement with measurements of the surface pressure and far field sound spectra. The computational cost of the new model is only slightly higher than the one of the TNO model, because we derived an analytical solution for the turbulence cross correlation terms.

AB - The paper describes an improvement of the so-called TNO model to predict the noise emission from aerofoil sections due to the interaction of the boundary layer turbulence with the trailing edge. The surface pressure field close to the trailing edge acts as source of sound in the TNO model. It is computed by solving a Poisson equation which includes flow turbulence cross correlation terms. Previously published TNO type models used the assumption of Blake to simplify the Poisson equation. This paper shows that the simplification should not be used. We present a new model which fully models the turbulence cross correlation terms. The predictions of the new model are in better agreement with measurements of the surface pressure and far field sound spectra. The computational cost of the new model is only slightly higher than the one of the TNO model, because we derived an analytical solution for the turbulence cross correlation terms.

U2 - 10.1016/j.euromechflu.2016.09.005

DO - 10.1016/j.euromechflu.2016.09.005

M3 - Journal article

VL - 61

SP - 255

EP - 262

JO - European Journal of Mechanics B - Fluids

JF - European Journal of Mechanics B - Fluids

SN - 0997-7546

ER -