CFD-based analysis of dynamic coefficients in labyrinth seals with teeth on stator: comparison with bulk-flow models

Abstract Maintaining effective sealing in turbomachinery is critical to operational stability and efficiency. Labyrinth seals, widely used for their favorable leakage control, can introduce destabilizing forces that affect rotor dynamics. This study investigates the calculation of dynamic coefficients in straight labyrinth seals with teeth on the stator (TOS) using a three-dimensional Computational Fluid Dynamics (CFD) approach based on the Precessional Rotor Method. The CFD results are compared