A Numerical CFD Analysis on Supply Groove Effects in High Pressure, Open End Squeeze Film Dampers

Research Area: Volume 5,Issue 1, Jan. 2016 Year: 2016
Type of Publication: Article Keywords: Squeeze Film, CFD, Supply Groove, Supply Hole
Authors:
  • Saeid Dousti
  • Ali Gerami
  • Majid Dousti
Journal: IJEIR Volume: 5
Number: 1 Pages: 80-89
Month: January
ISSN: 2277-5668
Abstract:
In this paper, we address the supply groove depth and pressurization effects on the behavior of open end squeeze film dampers using numerical CFD approach. A steady state moving reference frame technique, rather than a full time transient one, is implemented in this study, which allows shortening the computation time significantly and to be able to examine more cases readily. Our findings show that significant fluid motion takes place in the supply groove causing its pressure to be varying mainly in circumferential direction and be lower than the supply pressure, in general. The supply holes configuration plays an important role in pressure profile both in groove and land region, especially when the supply groove is shallow. Mid land grooves may have significant dynamic contribution to squeeze film dampers despite their large depth. There exists an optimal supply groove depth which renders the squeeze film damper most effective. In higher rotational speeds and shallow supply grooves, negative pressure values and cavitation phenomenon appear which defeats the purpose of pressurization to a certain extent.

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