Modern turbofan engines employ a highly loaded fan stage with transonic or low-supersonic velocities in the blade-tip region. The fan blades are often prone to flutter at off-design conditions. Flutter is a highly undesirable and dangerous self-excited mode of blade oscillations that can result in high-cycle fatigue blade failure. The origins of blade flutter are not fully understood yet. The latest view is that the blade oscillations are triggered by high-frequency changes in the extent of the partially separated area on the airfoil suction side. There is a lack of experimental data describing the separated flow characteristics of modern airfoils for transonic fans.
Complex Flow Separation Pattern on Transonic Fan Airfoils Revealed by Flow Visualization
2001-03-01
Sonstige
Keine Angabe
Englisch
NTRS | 1978
|Porous Airfoils in Transonic Flow
AIAA | 1984
|Transonic Flow past Lifting Airfoils
AIAA | 1973
|Inviscid transonic flow over airfoils
AIAA | 1970
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