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- W2384350068 abstract "With the development of rotating machinery towards higher speed and higher efficiency,the vibration excited by fluid in labyrinth seal occurs more frequently.In order to reveal the nonlinear dynamic behaviour of rotor-seal system,a numerical method to calculate the nonlinear fluid exciting forces was put forward based on the commercial computational fluid dynamics(CFD) software Fluent.The nonlinear aerodynamic force was calculated with various eccentricities and whirl speeds,and under each eccentricity and whirl speed,the dynamic coefficients of labyrinth seal were also calculated.The nonlinear aerodynamic forces of the seal under any displacement and velocity disturbance were obtained.It was discussed how to set the total and static inlet pressure by Fluent.The calculation results indicated that there was nonlinear relationship between aerodynamic forces and eccentricities,and positive pre-swirling had negative effect on the system stability.On condition of pre-swirling speed at the seal inlet,when increasing the pressure difference,the cross stiffness was increased in the negative direction,and the direct damping was decreased,which could lead to instability of rotor system." @default.
- W2384350068 created "2016-06-24" @default.
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- W2384350068 date "2009-01-01" @default.
- W2384350068 modified "2023-09-28" @default.
- W2384350068 title "Numerical calculation of nonlinear dynamic characteristics for labyrinth seals" @default.
- W2384350068 hasPublicationYear "2009" @default.
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