Stability and bifurcation behaviour of a Laval‐Rotor considering fluid forces in compliant liquid seals. Issue 1 (21st October 2015)

• Record Type: Journal Article
• Authors: Bäuerle, Simon; Hetzler, Hartmut
• Is Part Of: Proceedings in applied mathematics and mechanics. Volume 15:Issue 1(2015)
• Page Start: 241
• Page End: 242
• Publication Date: 2015-10-21
• Subjects: Applied mathematics -- Periodicals; Engineering mathematics -- Periodicals; Mathematical physics -- Periodicals; 519
• DOI: 10.1002/pamm.201510111
• Languages: English
• ISSNs: 1617-7061

Abstract

Abstract: This contribution discusses the influence of fluid forces, stemming from compliant, contact‐free annular rotor seals, on the steady state stability and bifurcation behaviour of a rotor. The model used in this work consists of a Laval‐Rotor where the disc runs in a turbulently streamed seal. The compliance of the seal is reduced to a visco‐elastically supported outer seal ring. In order to account for the fluid seal forces the Childs‐Hirs‐model is used. An investigation of the eigenvalues shows that the compliance of the seal support may lead to a significant increase in the stable operating range. A stability‐loss via Hopf‐, Hopf‐Hop f or secondary Hopf‐ Bifurcations can occur depending on the system parameters. (© 2015 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)