Abstract
Annular seals are used in centrifugal pumps to separate areas of different pressures. In the fluid gap, motion dependent interaction (MDI) forces act on the rotor due to relative motion between static and rotating parts. These fluid-structure-interactions have a decisive influence on the rotordynamic properties of the whole system. In order to predict the MDI forces, powerful numerical techniques and a new experimental method have been developed. The test rig uses active magnetic bearings to support the rotor and to create defined artificial relative motions. For a long annular seal (L/D = 2,0) experimental results are compared with calculated results obtained from a finite difference procedure. Excellent agreement is obtained, especially for coefficients which mainly influence the stability of the component. This validates the accuracy of the developed computer codes. Rotor-dynamic coefficients generated in the eye and the back seal of a 3-D radial impeller are also calculated. In parallel, measurements ...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
