CFD simulation of microscale flow field in spiral groove dry gas seal

Abstract

The three dimension micro-scale flow field in spiral groove dry gas seals(S-DGS) is simulated by using CFD software based on gas lubrication theory in this article. Effect of gas flow state on the Seal performance is analyzed under different gas film thickness. Laminar model and k-ε turbulent model are used separately to obtain the open force, leakage rate. The results show that gas pressure distribution is in well agreement with reference. The turbulence effect of gas film can enhance the hydrodynamic effect and hence enlarge the open force, while decrease the leakage rate of seal.