Gas labyrinth seals: On the effect of clearance and operating conditions on wall friction factors - A CFD investigation Academic Article uri icon


  • 2018 Elsevier Ltd This paper presents a computational fluid dynamic (CFD) investigation quantifying the effects of labyrinth seal geometry and operating conditions on the rotor and stator circumferential friction factors (fr, fs). These are needed to improve bulk-flow model (BFM) predictions of the evolution of circumferential flow velocity and the seal force coefficients. For a typical labyrinth seal tested by Vannini et al. (2014), the rotor fr is independent of changes in clearance (0.82 Cr) or the inlet preswirl ratio (inlet = 00.72); whereas an increase in rotor speed (R = 58173 m/s) or outlet/inlet pressure ratio (PR = Pout/Pin = 0.400.85) decreases fr. On the other hand, an increase in , PR, and inlet decrease the stator fs. Besides, fs increases with Cr. Predictions show that fr and fs are mainly sensitive to PR, not to the magnitude of supply and discharge pressures.

published proceedings


author list (cited authors)

  • Wu, T., & San Andres, L.

citation count

  • 21

complete list of authors

  • Wu, Tingcheng||San Andres, Luis

publication date

  • March 2019