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 abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 <italic>Childs‐Hirs‐model</italic> 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 <italic>Hopf‐</italic>, <italic>Hopf‐Hop</italic>f or secondary <italic>Hopf‐</italic>Bifurcations can occur depending on the system parameters. (© 2015 Wiley‐VCH Verlag GmbH &amp; Co. KGaA, Weinheim)</p> </abstract>