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1. 1. Flutter in sectored turbine vanes

   Författare :Olga V. Chernysheva; KTH; []
   Nyckelord :turbomachinery; aerodynamics; unsteady CFD; design; flutter;

   Sammanfattning : In order to eliminate or reduce vibration problems inturbomachines without a high increase in the complexity of thevibratory behavior, the adjacent airfoils around the wheel areoften mechanically connected together with lacing wires, tip orpart-span shrouds in a number of identical sectors. Although anaerodynamic stabilizing effect of tying airfoils together ingroups on the whole cascade is indicated by numerical andexperimental studies, for some operating conditions suchsectored vane cascade can still remain unstable. LÄS MER