Comptes Rendus
Noise reduction of a Mach 0.7–0.9 jet by impinging microjets
Comptes Rendus. Mécanique, Volume 334 (2006) no. 2, pp. 98-104.

A global noise reduction of a high-subsonic jet is achieved by experimental use of an impinging microjets system. The microjet velocity relative to the main jet velocity, the longitudinal distance of injection and the number of microjets are the three parameters examined in order to obtain the maximum noise reduction. This optimized microjet configuration is obtained by a balance between low-frequency attenuation and high-frequency noise generation due to the interaction between the microjets and the main jet mixing layer.

Cette étude concerne la réduction du bruit global d'un jet subsonique par un système de microjets impactants. Le rapport entre la vitesse des microjets et celle du jet principal, la distance longitudinale d'injection et le nombre de microjets sont les trois paramètres présentement étudiés pour atteindre un maximum de réduction de bruit. La configuration dite optimale correspond à un équilibre entre la réduction de bruit en basse fréquence et une régénération de bruit en haute fréquence due à l'interaction entre les microjets et la couche de mélange du jet principal.

Received:
Accepted:
Published online:
DOI: 10.1016/j.crme.2006.01.001
Keywords: Fluid mechanics, Jet, Noise reduction, Microjet
Mot clés : Mécanique des fluides, Jet, Réduction de bruit, Microjet

Thomas Castelain 1; Jean-Christophe Béra 1, 2; Michel Sunyach 1

1 Centre acoustique, 36, avenue Guy-de-Collongue, 69134 Ecully, France
2 INSERM U556, 151, cours Albert-Thomas, 69424 Lyon cedex 03, France
@article{CRMECA_2006__334_2_98_0,
     author = {Thomas Castelain and Jean-Christophe B\'era and Michel Sunyach},
     title = {Noise reduction of a {Mach} 0.7{\textendash}0.9 jet by impinging microjets},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {98--104},
     publisher = {Elsevier},
     volume = {334},
     number = {2},
     year = {2006},
     doi = {10.1016/j.crme.2006.01.001},
     language = {en},
}
TY  - JOUR
AU  - Thomas Castelain
AU  - Jean-Christophe Béra
AU  - Michel Sunyach
TI  - Noise reduction of a Mach 0.7–0.9 jet by impinging microjets
JO  - Comptes Rendus. Mécanique
PY  - 2006
SP  - 98
EP  - 104
VL  - 334
IS  - 2
PB  - Elsevier
DO  - 10.1016/j.crme.2006.01.001
LA  - en
ID  - CRMECA_2006__334_2_98_0
ER  - 
%0 Journal Article
%A Thomas Castelain
%A Jean-Christophe Béra
%A Michel Sunyach
%T Noise reduction of a Mach 0.7–0.9 jet by impinging microjets
%J Comptes Rendus. Mécanique
%D 2006
%P 98-104
%V 334
%N 2
%I Elsevier
%R 10.1016/j.crme.2006.01.001
%G en
%F CRMECA_2006__334_2_98_0
Thomas Castelain; Jean-Christophe Béra; Michel Sunyach. Noise reduction of a Mach 0.7–0.9 jet by impinging microjets. Comptes Rendus. Mécanique, Volume 334 (2006) no. 2, pp. 98-104. doi : 10.1016/j.crme.2006.01.001. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2006.01.001/

[1] C.K.W. Tam, Jet noise generated by large-scale coherent motion, in: H.H. Hubbard (Ed.), Aeroacoustics of Flight Vehicles, vol. 1, Noise Sources, 1995, pp. 311–390

[2] R. Westley, G.M. Lilley, An investigation of the noise field from a small jet and methods for its reduction, College of Aeronautics Cranfield Report, N° 53, 1952

[3] J.C. Simonich; S. Narayanan Aeroacoustic characterization, noise reduction and dimensional scaling effects of high subsonic jets, AIAA J., Volume 39 (2001) no. 11, pp. 2062-2069

[4] K.M.B.Q. Zaman, Effects of delta tabs on mixing and axis switching in jets from axisymmetric nozzles, AIAA Paper 94-0186, 1994

[5] K.M.B.Q. Zaman Spreading characteristics of compressible jets from nozzles of various geometries, J. Fluid. Mech., Volume 383 (1999), pp. 197-228

[6] V.H. Arakeri; A. Krothapalli On the use of microjets to suppress turbulence in a Mach 0.9 axisymmetric jet, J. Fluid. Mech., Volume 490 (2003), pp. 75-98

[7] S. Lewy Acoustique industrielle et aéroacoustique, Hermes, 2000

[8] T. Castelain, M. Dietrich, J.C. Béra, M. Sunyach, Contrôle par microjets d'une couche de mélange: exploitation de mesures PIV synchronisées, in: 40ème Colloque d'Aérodynamique Appliquée, Toulouse, France, mars 2005

[9] A.K.M.F. Hussain; M.A.Z. Hasan Turbulence suppression in free turbulent shear flows under controlled excitation. Part 2: Jet-noise reduction, J. Fluid. Mech., Volume 150 (1985), pp. 159-168

[10] C.K.W. Tam Jet noise since 1952, Theor. Comput. Fluid Dyn., Volume 10 (1998), pp. 393-405

[11] K.M.B.Q. Zaman; J.C. Yu Power spectral density of subsonic jet noise, J. Sound Vib., Volume 98 (1985), pp. 519-537

[12] T. Norum Reductions in multi-component jet noise by water injection http://hdl.handle.net/2002/15630 (in: 10th AIAA/CEAS Aeroacoutics Conference, Manchester, United Kingdom, AIAA-2004-2976, 2004)

[13] G.M. Di Cicca; G. Iuso; P.G. Spazzini; M. Onorato PIV study of the influence of large-scale streamwise vortices on a turbulent boundary layer, Exp. Fluids, Volume 33 (2002), pp. 663-669

Cited by Sources:

Comments - Policy