This paper presents a radius scale actuator disk model, which describes the flow response to a whirling/spinning rotor in an unshrouded turbine. At each azimuth, the upstream-downstream flow variables are matched by the results from a steady blade scale analysis presented in a companion paper, with allowance for mass storage in the stator-rotor region. The new model can accurately predict the magnitude of both direct and cross excitation forces as well as their breakdown into work extraction and pressure effects. The trends versus the mean flow coefficient and interblade distance are predicted. While underpredicted, a trend versus mean rotor tip clearance height is also indicated. Thus, the new model captures the dominant physical effects caused by a whirling/spinning rotor in an unshrouded turbine.
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October 1997
Research Papers
Rotordynamic Forces Due to Turbine Tip Leakage: Part II—Radius Scale Effects and Experimental Verification
S. J. Song,
S. J. Song
Department of Aerospace Engineering, Inha University, Namgu, Inchon, Korea
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M. Martinez-Sanchez
M. Martinez-Sanchez
Department of Aeronautics/Astronautics, MIT, Cambridge, MA 02139
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S. J. Song
Department of Aerospace Engineering, Inha University, Namgu, Inchon, Korea
M. Martinez-Sanchez
Department of Aeronautics/Astronautics, MIT, Cambridge, MA 02139
J. Turbomach. Oct 1997, 119(4): 704-713 (10 pages)
Published Online: October 1, 1997
Article history
Received:
February 1, 1996
Online:
January 29, 2008
Connected Content
This is a companion to:
Tribology in Cold Metal Forming
Citation
Song, S. J., and Martinez-Sanchez, M. (October 1, 1997). "Rotordynamic Forces Due to Turbine Tip Leakage: Part II—Radius Scale Effects and Experimental Verification." ASME. J. Turbomach. October 1997; 119(4): 704–713. https://doi.org/10.1115/1.2841180
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