Modélisation du comportement statique et dynamique des joints labyrinthes dans les turbomachines

The labyrinth seals are the devices used in rotating machinery, they serve to restrict the leakage flow crossing a carter by a rotating shaft and to avoid the important friction at high rotating speeds. These devices can modify the dynamic characteristics of the line of the shaft in which they are integrated. The present work allows determining the effect of physical parameters on the dynamic coefficients. The object of this work consists to better control the flows within labyrinth seals and to be a better the stability of machinery.