Stator Design Method in Rotor–Stator Interference Flow Fields in Order to Suppress the Vibration of Bladed Disks

Abstract

Based on the computation and analysis of three-dimensional unsteady flow induced by rotor/stator interactions, the characteristics of flow excitation towards bladed disks were studied, including frequency components and circumferential wave components. By combining the resonant condition of bladed disks, a design principle was derived for determining the stator structural period from the view of averting resonance. The influences of different topologies on mistuned stators are also studied, for which the sectional non-uniform mistuned stator showed a clear effect in lowering the amplitude of formal excitation characteristics compared to tuned cases. A formula was developed to predict frequency components and circumferential wave components in the wake of both tuned and mistuned stators, making it easier to determine stator structural topologies in the design phase without performing three-dimensional unsteady CFD.