Application of Viscothermal Wave Propagation Theory for Reduction of Boundary Layer Induced Noise

Ysbrand H. Wijnant; M.H.C. Hannink; Andries de Boer

Application of Viscothermal Wave Propagation Theory for Reduction of Boundary Layer Induced Noise

Ysbrand H. Wijnant
, M.H.C. Hannink
, Andries de Boer

Faculty of Engineering Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

94 Downloads (Pure)

Abstract

Boundary layer induced noise, i.e. noise inside the aircraft resulting from the turbulent boundary layer enclosing the fuselage, is known to dominate air-cabin noise at cruise conditions. In this paper a method is described to design trim panels containing a large number of coupled tubes to effectively reduce this type of noise. The theory of viscothermal wave propagation in tubes, as presented by Tijdeman [3], is discussed. To illustrate the procedure the absorption coefficient for a panel containing a number of non-coupled tubes is calculated. Initial results optimising the tubes’ length and radii for a desired fictive absorption coefficient are presented and prove the applicability of the method.

Original language	Undefined
Title of host publication	Euronoise
Editors	G. Brambilla, C. Ianeillo, L. Maffei
Place of Publication	Napels
Publisher	Associazione Italiana di Acustica (AIA)
Pages	-
Number of pages	6
ISBN (Print)	88-88942-00-9
Publication status	Published - 19 May 2003
Event	5th European Conference on Noise Control, EURONOISE 2003 - Naples, Italy Duration: 19 May 2003 → 21 May 2003 Conference number: 5

Conference

Conference	5th European Conference on Noise Control, EURONOISE 2003
Abbreviated title	EURONOISE
Country/Territory	Italy
City	Naples
Period	19/05/03 → 21/05/03

Keywords

METIS-216820
IR-58837

Access to Document

Wijnant03Euronoise

Cite this

@inproceedings{f30c0c43b9744c06b0a70e1b7aeb523d,

title = "Application of Viscothermal Wave Propagation Theory for Reduction of Boundary Layer Induced Noise",

abstract = "Boundary layer induced noise, i.e. noise inside the aircraft resulting from the turbulent boundary layer enclosing the fuselage, is known to dominate air-cabin noise at cruise conditions. In this paper a method is described to design trim panels containing a large number of coupled tubes to effectively reduce this type of noise. The theory of viscothermal wave propagation in tubes, as presented by Tijdeman [3], is discussed. To illustrate the procedure the absorption coefficient for a panel containing a number of non-coupled tubes is calculated. Initial results optimising the tubes{\textquoteright} length and radii for a desired fictive absorption coefficient are presented and prove the applicability of the method.",

keywords = "METIS-216820, IR-58837",

author = "Wijnant, \{Ysbrand H.\} and M.H.C. Hannink and \{de Boer\}, Andries",

year = "2003",

month = may,

day = "19",

language = "Undefined",

isbn = "88-88942-00-9",

pages = "--",

editor = "G. Brambilla and C. Ianeillo and L. Maffei",

booktitle = "Euronoise",

publisher = "Associazione Italiana di Acustica (AIA)",

note = "5th European Conference on Noise Control, EURONOISE 2003 ; Conference date: 19-05-2003 Through 21-05-2003",

}

Application of Viscothermal Wave Propagation Theory for Reduction of Boundary Layer Induced Noise. / Wijnant, Ysbrand H.; Hannink, M.H.C.; de Boer, Andries.
Euronoise. ed. / G. Brambilla; C. Ianeillo; L. Maffei. Napels: Associazione Italiana di Acustica (AIA), 2003. p. -.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Application of Viscothermal Wave Propagation Theory for Reduction of Boundary Layer Induced Noise

AU - Wijnant, Ysbrand H.

AU - Hannink, M.H.C.

AU - de Boer, Andries

N1 - Conference code: 5

PY - 2003/5/19

Y1 - 2003/5/19

N2 - Boundary layer induced noise, i.e. noise inside the aircraft resulting from the turbulent boundary layer enclosing the fuselage, is known to dominate air-cabin noise at cruise conditions. In this paper a method is described to design trim panels containing a large number of coupled tubes to effectively reduce this type of noise. The theory of viscothermal wave propagation in tubes, as presented by Tijdeman [3], is discussed. To illustrate the procedure the absorption coefficient for a panel containing a number of non-coupled tubes is calculated. Initial results optimising the tubes’ length and radii for a desired fictive absorption coefficient are presented and prove the applicability of the method.

AB - Boundary layer induced noise, i.e. noise inside the aircraft resulting from the turbulent boundary layer enclosing the fuselage, is known to dominate air-cabin noise at cruise conditions. In this paper a method is described to design trim panels containing a large number of coupled tubes to effectively reduce this type of noise. The theory of viscothermal wave propagation in tubes, as presented by Tijdeman [3], is discussed. To illustrate the procedure the absorption coefficient for a panel containing a number of non-coupled tubes is calculated. Initial results optimising the tubes’ length and radii for a desired fictive absorption coefficient are presented and prove the applicability of the method.

KW - METIS-216820

KW - IR-58837

M3 - Conference contribution

SN - 88-88942-00-9

SP - -

BT - Euronoise

A2 - Brambilla, G.

A2 - Ianeillo, C.

A2 - Maffei, L.

PB - Associazione Italiana di Acustica (AIA)

CY - Napels

T2 - 5th European Conference on Noise Control, EURONOISE 2003

Y2 - 19 May 2003 through 21 May 2003

ER -