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- W2380821955 abstract "The Muszynska′s model of seal fluid dynamic forces is used to analyze the nonlinear dynamic characteristics of labyrinth seal-rotating wheel system in hydraulic turbines,and investigate the nonlinear dynamic stability of hydraulic turbines with labyrinth seal.The results show that there is occurrence of Hopf bifurcation after threshold speed is exceeded and the rotating wheel comes into bifurcated periodic orbit.While the amplitude of bifurcated motion will rise according to improvement of rotor speed,which may cause the rotating wheel impact seal at certain speed.Lyapunov′s first approximate theory is used to analyze nonlinear system stability,and Runge-Kutta method is used to analyze numerical simulation computation.Finally,the influence of physical and structural parameter of seal on rotor is investigated.Sensitivity analysis of nonlinear dynamic characteristics is performed by changing the physical and structural parameters of seal-rotating wheel system.By comparing with eight-parameters model,it is tested that the variation tendency of Muszynska model is identical." @default.
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- W2380821955 date "2007-01-01" @default.
- W2380821955 modified "2023-09-27" @default.
- W2380821955 title "Study of nonlinear dynamic stability of labyrinth seal-rotating wheel system in hydraulic turbines" @default.
- W2380821955 hasPublicationYear "2007" @default.
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