ROTOR BLADE FLUTTER IN LAST STAGE OF LP STEAM TURBINE

摘要

This paper presents a numerical study of flutter in the last stage of a LP steam turbine blades using in-house codes and ANSYS CFX. The mode shapes and natural frequencies of the steam turbine bladed disk are calculated using an FEM model. The instability regions in 5 mode shapes and the distribution of the aerodamping coefficient along the blade length were shown in the case of harmonic blade oscillations with an assumed interblade phase angle.