An investigation of the sensitivity of a geometrical scaling technique on the blade forcing prediction and mode excitability has been performed. A stage of a transonic compressor is employed as a test object. A scaling ratio is defined, which indicates the amount of scaling from the original geometry. Different scaling ratios are selected and 3D Navier–Stokes unsteady calculations completed for each scaled configuration. A full-annulus calculation (nonscaled) is performed serving as reference. The quantity of interest is the generalized force, which gives a direct indication of the mode excitability. In order to capture both up- and downstream excitation effects, the mode excitability has been assessed on both rotor and stator blades. The results show that the first harmonic excitation can be predicted well for both up- and downstream excitations using moderate amounts of scaling. On the other hand, the predictions of second harmonic quantities do show a higher sensitivity to scaling for the investigated test case.
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April 2011
Research Papers
Effect of Scaling of Blade Row Sectors on the Prediction of Aerodynamic Forcing in a Highly Loaded Transonic Compressor Stage
María A. Mayorca,
María A. Mayorca
Royal Institute of Technology
, Heat and Power Technology, S-100 44 Stockholm, Sweden
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Jesús A. De Andrade,
Jesús A. De Andrade
Laboratorio de Conversión de Energía Mecánica,
Universidad Simón Bolívar
, 1080 Sartenejas, Miranda, Venezuela
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Damian M. Vogt,
Damian M. Vogt
Royal Institute of Technology
, Heat and Power Technology, S-100 44 Stockholm, Sweden
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Hans Mårtensson,
Hans Mårtensson
Volvo Aero Corporation
, S-461 81 Trollhättan, Sweden
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Torsten H. Fransson
Torsten H. Fransson
Royal Institute of Technology
, Heat and Power Technology, S-100 44 Stockholm, Sweden
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María A. Mayorca
Royal Institute of Technology
, Heat and Power Technology, S-100 44 Stockholm, Sweden
Jesús A. De Andrade
Laboratorio de Conversión de Energía Mecánica,
Universidad Simón Bolívar
, 1080 Sartenejas, Miranda, Venezuela
Damian M. Vogt
Royal Institute of Technology
, Heat and Power Technology, S-100 44 Stockholm, Sweden
Hans Mårtensson
Volvo Aero Corporation
, S-461 81 Trollhättan, Sweden
Torsten H. Fransson
Royal Institute of Technology
, Heat and Power Technology, S-100 44 Stockholm, SwedenJ. Turbomach. Apr 2011, 133(2): 021013 (10 pages)
Published Online: October 22, 2010
Article history
Received:
July 21, 2009
Revised:
July 30, 2009
Online:
October 22, 2010
Published:
October 22, 2010
Citation
Mayorca, M. A., De Andrade, J. A., Vogt, D. M., Mårtensson, H., and Fransson, T. H. (October 22, 2010). "Effect of Scaling of Blade Row Sectors on the Prediction of Aerodynamic Forcing in a Highly Loaded Transonic Compressor Stage." ASME. J. Turbomach. April 2011; 133(2): 021013. https://doi.org/10.1115/1.4000579
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