The turbomachinery industry continually struggles with the adverse effects of contact rubs between airfoils and casings. The key parameter controlling the severity of a given rub event is the contact load produced when the airfoil tips incur into the casing. These highly nonlinear and transient forces are difficult to calculate and their effects on the static and rotating components are not well understood. To help provide this insight, experimental and analytical capabilities have been established and exercised through an alliance between GE Aviation and The Ohio State University Gas Turbine Laboratory. One of the early findings of the program is the influence of blade flexibility on the physics of rub events. The focus of this paper is to quantify the influence of airfoil flexibility through a novel modeling approach that is based on the relationship between the applied force duration and maximum tip deflection. Results from the model are compared with experimental results, providing sound verification.
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January 2012
Research Papers
Airfoil Deflection Characteristics During Rub Events
Kevin E. Turner,
Kevin E. Turner
GE Aviation Lead Engineer
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Michael Dunn,
Michael Dunn
Department of Mechanical Engineering,
The Ohio State University
, Gas Turbine Laboratory, 2300 West Case Rd., Columbus, OH, 43235
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Corso Padova
Corso Padova
Department of Mechanical Engineering,
The Ohio State University
, Gas Turbine Laboratory, 2300 West Case Rd., Columbus, OH, 43235
Search for other works by this author on:
Kevin E. Turner
GE Aviation Lead Engineer
Michael Dunn
Department of Mechanical Engineering,
The Ohio State University
, Gas Turbine Laboratory, 2300 West Case Rd., Columbus, OH, 43235
Corso Padova
Department of Mechanical Engineering,
The Ohio State University
, Gas Turbine Laboratory, 2300 West Case Rd., Columbus, OH, 43235J. Turbomach. Jan 2012, 134(1): 011018 (8 pages)
Published Online: May 31, 2011
Article history
Received:
October 10, 2010
Revised:
November 9, 2010
Online:
May 31, 2011
Published:
May 31, 2011
Citation
Turner, K. E., Dunn, M., and Padova, C. (May 31, 2011). "Airfoil Deflection Characteristics During Rub Events." ASME. J. Turbomach. January 2012; 134(1): 011018. https://doi.org/10.1115/1.4003257
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