The present work details the occurrence of the Kelvin–Helmholtz instability in a centrifugal compressor operating near stall. The analysis is based on unsteady three-dimensional simulations performed on a calculation domain covering the full annulus for the impeller and the vaned diffuser. A detailed investigation of the flow structure is presented, together with its evolution consequent to the mass flow reduction. It is demonstrated that this reduction leads to an enlargement of the low-momentum flow region initially induced by the combination of the secondary and leakage flows. When the compressor operates near stall, the shear layer at the interface between the main flow and this low-momentum flow becomes unstable and induces a periodic vortex shedding. The frequency of such an unsteady phenomenon is not correlated with the blade-passing frequency. Its signature is thus easily isolated from the deterministic rotor/stator interaction. Its detection requires full-annulus simulations with an accurate resolution in time and space, which explains why it has never been previously observed in centrifugal compressors.
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July 2016
Research-Article
Numerical Investigation of Kelvin–Helmholtz Instability in a Centrifugal Compressor Operating Near Stall
Y. Bousquet,
Y. Bousquet
Département Aérodynamique,
Energétique et Propulsion,
Université de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Yannick.Bousquet@isae.fr
Energétique et Propulsion,
Université de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Yannick.Bousquet@isae.fr
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N. Binder,
N. Binder
Département Aérodynamique,
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Nicolas.Binder@isae.fr
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Nicolas.Binder@isae.fr
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G. Dufour,
G. Dufour
Département Aérodynamique,
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Guillaume.Dufour@isae.fr
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Guillaume.Dufour@isae.fr
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X. Carbonneau,
X. Carbonneau
Département Aérodynamique,
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Xavier.Carbonneau@isae.fr
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Xavier.Carbonneau@isae.fr
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I. Trebinjac,
I. Trebinjac
Laboratoire de Mécanique des Fluides et
d'Acoustique,
Ecole Centrale de Lyon,
UCBLyon 1, INSA,
36 Avenue Guy de Collongue,
Ecully Cedex 69134, France
e-mail: Isabelle.Trebinjac@ec-lyon.fr
d'Acoustique,
Ecole Centrale de Lyon,
UCBLyon 1, INSA,
36 Avenue Guy de Collongue,
Ecully Cedex 69134, France
e-mail: Isabelle.Trebinjac@ec-lyon.fr
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M. Roumeas
M. Roumeas
Département aéroacoustique,
Liebherr-Aerospace Toulouse SAS,
408 Avenue des Etats-Unis,
Toulouse 31016, France
e-mail: Mathieu.Roumeas@Liebherr.com
Liebherr-Aerospace Toulouse SAS,
408 Avenue des Etats-Unis,
Toulouse 31016, France
e-mail: Mathieu.Roumeas@Liebherr.com
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Y. Bousquet
Département Aérodynamique,
Energétique et Propulsion,
Université de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Yannick.Bousquet@isae.fr
Energétique et Propulsion,
Université de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Yannick.Bousquet@isae.fr
N. Binder
Département Aérodynamique,
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Nicolas.Binder@isae.fr
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Nicolas.Binder@isae.fr
G. Dufour
Département Aérodynamique,
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Guillaume.Dufour@isae.fr
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Guillaume.Dufour@isae.fr
X. Carbonneau
Département Aérodynamique,
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Xavier.Carbonneau@isae.fr
Energétique et Propulsion,
Universite de Toulouse, ISAE,
10, Avenue Edouard Belin BP 54032,
Toulouse Cedex 4 31055, France
e-mail: Xavier.Carbonneau@isae.fr
I. Trebinjac
Laboratoire de Mécanique des Fluides et
d'Acoustique,
Ecole Centrale de Lyon,
UCBLyon 1, INSA,
36 Avenue Guy de Collongue,
Ecully Cedex 69134, France
e-mail: Isabelle.Trebinjac@ec-lyon.fr
d'Acoustique,
Ecole Centrale de Lyon,
UCBLyon 1, INSA,
36 Avenue Guy de Collongue,
Ecully Cedex 69134, France
e-mail: Isabelle.Trebinjac@ec-lyon.fr
M. Roumeas
Département aéroacoustique,
Liebherr-Aerospace Toulouse SAS,
408 Avenue des Etats-Unis,
Toulouse 31016, France
e-mail: Mathieu.Roumeas@Liebherr.com
Liebherr-Aerospace Toulouse SAS,
408 Avenue des Etats-Unis,
Toulouse 31016, France
e-mail: Mathieu.Roumeas@Liebherr.com
1Corresponding author.
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received December 4, 2015; final manuscript received December 15, 2015; published online February 17, 2016. Editor: Kenneth C. Hall.
J. Turbomach. Jul 2016, 138(7): 071007 (9 pages)
Published Online: February 17, 2016
Article history
Received:
December 4, 2015
Revised:
December 15, 2015
Citation
Bousquet, Y., Binder, N., Dufour, G., Carbonneau, X., Trebinjac, I., and Roumeas, M. (February 17, 2016). "Numerical Investigation of Kelvin–Helmholtz Instability in a Centrifugal Compressor Operating Near Stall." ASME. J. Turbomach. July 2016; 138(7): 071007. https://doi.org/10.1115/1.4032457
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