Aiming at the cavitation effect and steady-state sealing performance of the end face spiral groove liquid film seal,based on the k-ω turbulence model and the Schnerr-Sauer cavitation model.The flow field of the mechanical seal end face spiral groove liquid film was simulated by professional flow field simulation software. The effects of different helical groove geometric parameters and operating parameters on the steady-state performance of the seal and the area of the cavitation area under two flow regimes of laminar flow and turbulence were compared and analyzed.The results show that the opening force,leakage rate and cavitation area ratio of the end face spiral groove liquid film seal in the the turbulence state are all larger than those in the laminar flow state,and with the changes of geometric parameters and working conditions parameters,the influence of turbulence effect on seal opening force,leakage rate and cavitation area ratio is basically similar with the laminar flow effect.Under different conditions,the cavitation effect is more likely to occur on the outer diameter side of the spiral groove,and the cavitation area under turbulence effect is significantly larger than that under laminar flow effect.These research results indicate that the effects of turbulence and cavitation effects on the steady-state performance of the seal cannot be ignored in the end face spiral groove liquid film seal.