This paper deals with the numerical simulation of technologies to increase the compressor performances. The objective is to extend the stable operating range of an axial compressor stage using passive control devices located in the tip region. First, the behavior of the tip leakage flow is investigated in the compressor without control. The simulation shows an increase in the interaction between the tip leakage flow and the main flow when the mass flow is reduced, a phenomenon responsible for the development of a large flow blockage region at the rotor leading edge. A separation of the rotor suction side boundary layer is also observed at near stall conditions. Then, two approaches are tested in order to control these flows in the tip region. The first one is a casing treatment with nonaxisymmetric slots. The method showed a good ability to control the tip leakage flow but failed to reduce the boundary layer separation on the suction side. However, an increase in the operability was observed but with a penalty for the efficiency. The second approach is a blade treatment that consists of a longitudinal groove built in the tip of each rotor blade. The simulation pointed out that the device is able to control partially all the critical flows with no penalty for the efficiency. Finally, some recommendations for the design of passive treatments are presented.
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April 2009
Research Papers
Unsteady Simulation of an Axial Compressor Stage With Casing and Blade Passive Treatments
Nicolas Gourdain,
Nicolas Gourdain
Computational Fluid Dynamics Team,
CERFACS
, 42 Avenue Gaspard Coriolis, Toulouse 31057, France
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Francis Leboeuf
Francis Leboeuf
Laboratoire de Mécanique des Fluides et d’Acoustique, UMR CNRS 5509,
University of Lyon
, 36 Avenue Guy de Collongue, Ecully 69034, France
Search for other works by this author on:
Nicolas Gourdain
Computational Fluid Dynamics Team,
CERFACS
, 42 Avenue Gaspard Coriolis, Toulouse 31057, France
Francis Leboeuf
Laboratoire de Mécanique des Fluides et d’Acoustique, UMR CNRS 5509,
University of Lyon
, 36 Avenue Guy de Collongue, Ecully 69034, FranceJ. Turbomach. Apr 2009, 131(2): 021013 (12 pages)
Published Online: January 29, 2009
Article history
Received:
December 18, 2007
Revised:
May 19, 2008
Published:
January 29, 2009
Citation
Gourdain, N., and Leboeuf, F. (January 29, 2009). "Unsteady Simulation of an Axial Compressor Stage With Casing and Blade Passive Treatments." ASME. J. Turbomach. April 2009; 131(2): 021013. https://doi.org/10.1115/1.2988156
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