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Monday, July 8 • 11:20 - 11:40
STUDY ON ROTOR DYNAMIC CHARACTERISTICS STIMULATED BY AIRFLOW IN LABYRINTH SEALS

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In this paper, a labyrinth seal calculation model of the dynamic characteristic coefficient is established, the influence of rotor rotating speed and pressure on the dynamic characteristic of labyrinth seal are numerically analyzed. The calculation results show that the cross stiffness and main damping are important factors affecting the stability of the seal-rotor system; the increase of speed and pressure between inlet and outlet are not conducive to the stability of the system.On the basis of numerical analysis, a research device for air flow excitation test is set up to study the influence of rotor speed ,pressure and other parameters on the vibration characteristics of the rotating subsystem. The experimental results show that the flow induced force increases the deformation of the flexible rotor, makes the stiffness of the rotor system change and changes the critical speed of the system. The flow of gas promotes the whirling of the rotor and makes the running track of the rotor more chaotic.

Moderators
EP

Elsa Piollet

Dr, Polytechnique Montréal

Authors
YZ

Yi Zhang

ACTIVE CONTROL OF VEHICLE INTERIOR ROAD NOISE USING NFXLMS ALGORITHM WITH TWO LOUDSPEAKERS, Tongji University


Monday July 8, 2019 11:20 - 11:40 EDT
Outremont 7
  T07 Struct. dyn. & nonlin. vib., RS04 Rotordynamics