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INFLUENCE OF THE BLADE COUNT RATIO ON AERODYNAMIC FORCING PART I: HIGHLY LOADED TRANSONIC COMPRESSOR
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
Volvo Aero. Researchers.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
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2010 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The influence of the Blade Count Ratio (BCR) on the aerodynamic forcing of a highly transonic compressor has been investigated. The focus has been put on the unsteady aerodynamics as well as mode excitability and thus High Cycle Fatigue (HCF) risk. A number of compressor stages were investigated that differed in blade count of the stator blade row. Time-resolved aerodynamic forcing results were acquired using a non-linear CFD approach. The results were decomposed into frequency content and combined with modal properties of the various components. It is found that the BCR is a key parameter to reduce generalized force and consequently vibratory HCF stresses. Furthermore a potential in avoiding and/or alleviating potential resonant crossings in the Campbell diagram is reported. The dependency of these aspects from BCR is largely non-linear and for the first time discussed in detail on the basis of a transonic compressor stage.

Place, publisher, year, edition, pages
2010. 1221-1233 p.
Series
PROCEEDINGS OF THE ASME TURBO EXPO 2010, VOL 6, PTS A AND B
Keyword [en]
GAS-TURBINE BLADES; UNSTEADY FORCES; PREDICTION; ROTOR
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-35144ISI: 000290927800123Scopus ID: 2-s2.0-82055189777OAI: oai:DiVA.org:kth-35144DiVA: diva2:426045
Conference
ASME TurboExpo 2010
Note
QC 20110622Available from: 2011-06-22 Created: 2011-06-20 Last updated: 2012-03-23Bibliographically approved

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Fruth, FlorianVogt, Damian M.Mayorca, Maria A.Fransson, Torsten H.
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CiteExportLink to record
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Citation style
  • apa
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More styles
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