Aerodynamic Excitation of Transonic Turbine Cascade; Description of the Experimental Method

This paper presents the design of a cascade and the experimental method to investigate shock inducted flutter. To examine the interaction between a shock wave and blade oscillation at transonic flow, a cascade with 7 blades, each of them separately elastically mounted, has been developed so that only an aerodynamic coupling can occur in the system. The experimental investigations have been performed at a two-dimensional test rig with superheated steam as working fluid.