This paper presents the results of the experimental investigation on the effects of internal acoustic excitation on enhancing performance of the annular cascade.

In regard to the excitation experiments, time-Accurate numerical stimulation was carried out to investigate the upstream disturbance frequency effect under different incidence in an annular cascade.

For validating the aerodynamic characteristics of LP turbine guide vane, the wind blow was carried out for test cascade of the guide vane on the low speed annular wind tunnel.