Time-Dependent Pressure Fluctuations on an Oscillating Turbine Cascade at Transonic Off-Design Flow Conditions

A cylindrical section of the last stage of a gas turbine blade has been investigated experimentally in an annular non-rotating cascade facility as regards to its steady-state and time-dependent aerodynamic characteristics for off-design inlet and transonic outlet flow conditions at realistic reduced frequencies. The blades vibrate in the first travelling wave bending mode.