INFLUENCE OF THE BLADE COUNT RATIO ON AERODYNAMIC FORCING PART I: HIGHLY LOADED TRANSONIC COMPRESSOR
2010 (English)Conference paper (Refereed)
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.
, PROCEEDINGS OF THE ASME TURBO EXPO 2010, VOL 6, PTS A AND B
GAS-TURBINE BLADES; UNSTEADY FORCES; PREDICTION; ROTOR
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-35144ISI: 000290927800123ScopusID: 2-s2.0-82055189777OAI: oai:DiVA.org:kth-35144DiVA: diva2:426045
ASME TurboExpo 2010
QC 201106222011-06-222011-06-202012-03-23Bibliographically approved