The paper focuses on the unsteady pressure field measured around the rotor midspan profile of the VKI Brite transonic turbine stage. The understanding of the complex unsteady flow field is supported by a quasi-three-dimensional unsteady Navier–Stokes computation using a turbulence model and a modified version of the Abu-Ghannam and Shaw correlation for the onset of transition. The agreement between computational and experimental results is satisfactory. They both reveal the dominance of the vane shock in the interaction. For this reason, it is difficult to identify the influence of vane-wake ingestion in the rotor passage from the experimental data. However, the computations allow us to draw some useful conclusions in this respect. The effect of the variation of the rotational speed, the stator–rotor spacing, and the stator trailing edge coolant flow ejection is investigated and the unsteady blade force pattern is analyzed.
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January 2001
Technical Papers
Investigation of the Unsteady Rotor Aerodynamics in a Transonic Turbine Stage
R. De´nos,
R. De´nos
Von Karman Institute for Fluid Dynamics, Rhode Saint Gene`se, Belgium
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T. Arts,
T. Arts
Von Karman Institute for Fluid Dynamics, Rhode Saint Gene`se, Belgium
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G. Paniagua,
G. Paniagua
Von Karman Institute for Fluid Dynamics, Rhode Saint Gene`se, Belgium
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V. Michelassi,
V. Michelassi
Department of Mechanical and Industrial Engineering, University of Rome, Tre, Italy
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F. Martelli
F. Martelli
Energetics Department “Sergio Stecco,” University of Florence, Florence, Italy
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R. De´nos
Von Karman Institute for Fluid Dynamics, Rhode Saint Gene`se, Belgium
T. Arts
Von Karman Institute for Fluid Dynamics, Rhode Saint Gene`se, Belgium
G. Paniagua
Von Karman Institute for Fluid Dynamics, Rhode Saint Gene`se, Belgium
V. Michelassi
Department of Mechanical and Industrial Engineering, University of Rome, Tre, Italy
F. Martelli
Energetics Department “Sergio Stecco,” University of Florence, Florence, Italy
Contributed by the International Gas Turbine Institute and presented at the 45th International Gas Turbine and Aeroengine Congress and Exhibition, Munich, Germany, May 8–11, 2000. Manuscript received by the International Gas Turbine Institute February 2000. Paper No. 2000-GT-435. Review Chair: D. Ballal.
J. Turbomach. Jan 2001, 123(1): 81-89 (9 pages)
Published Online: February 1, 2000
Article history
Received:
February 1, 2000
Citation
De´nos , R., Arts , T., Paniagua, G., Michelassi, V., and Martelli, F. (February 1, 2000). "Investigation of the Unsteady Rotor Aerodynamics in a Transonic Turbine Stage ." ASME. J. Turbomach. January 2001; 123(1): 81–89. https://doi.org/10.1115/1.1314607
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