Fan blades of high bypass ratio gas turbine engines are subject to substantial aerodynamic and centrifugal loads, producing the well-known phenomenon of fan blade untwist. The accurate prediction of the running geometry, as opposed to the cold geometry at rest, is crucial in the assessment of aerodynamic performance, vibratory response, and noise production of the fan. The situation is further complicated by the fact that some geometric variation is inevitable even for the state-of-the-art manufacturing processes used. The aim of this paper is to investigate the effect of static stagger variability on the dynamic untwist behavior of fan assemblies. An aeroelastic model was used to show that under certain conditions the stagger pattern changes significantly, both in form and amplitude, relative to the static configuration. At other conditions, a strong correlation between the running and static patterns is demonstrated.
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April 2007
Technical Papers
The Effect of Stagger Variability in Gas Turbine Fan Assemblies
Mark J. Wilson,
Mark J. Wilson
Imperial College London
, United Kingdom
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Mehmet Imregun,
Mehmet Imregun
Imperial College London
, United Kingdom
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Abdulnaser I. Sayma
Abdulnaser I. Sayma
University of Sussex
, Brighton, United Kingdom
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Mark J. Wilson
Imperial College London
, United Kingdom
Mehmet Imregun
Imperial College London
, United Kingdom
Abdulnaser I. Sayma
University of Sussex
, Brighton, United KingdomJ. Turbomach. Apr 2007, 129(2): 404-411 (8 pages)
Published Online: June 6, 2006
Article history
Received:
May 25, 2006
Revised:
June 6, 2006
Citation
Wilson, M. J., Imregun, M., and Sayma, A. I. (June 6, 2006). "The Effect of Stagger Variability in Gas Turbine Fan Assemblies." ASME. J. Turbomach. April 2007; 129(2): 404–411. https://doi.org/10.1115/1.2437776
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