Squeeze Film Damper Technology. Part 2. Extension of Analysis and Parametric Study

The present report this report provides refinements and extensions to the analytical treatment of squeeze film dampers reported in Part I. Specifically, it incorporates the effects of squeeze film dampers cavitation on performance based on short-bearing theory and particularly on the damping propert...

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Bibliographische Detailangaben
Hauptverfasser: Walton,J, Pinkus,O, Walowit,J, Tecza,J, Lee,C
Format: Report
Sprache:eng
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Zusammenfassung:The present report this report provides refinements and extensions to the analytical treatment of squeeze film dampers reported in Part I. Specifically, it incorporates the effects of squeeze film dampers cavitation on performance based on short-bearing theory and particularly on the damping properties. The analysis also provides means of a more accurate evaluation of the flow resistance in the feeding holes by taking account of the stagnation pressures at the entrance to the clearance space. With these modifications introduced into the computer program, a parametric study is then conducted on the effects of the many variables on the operation of sealed and unsealed dampers, both hole- and groove-fed. Among the variables considered are clearance, size, eccentricity ratio, supply pressure and system frequency. Conclusions are drawn as to the optimum values of these parameters with regard to best damper performance. Keywords: Rotordynamics, Cavitation Fluid Inertia. See also Part 3, AD-A178 095.