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http://dx.doi.org/10.9725/kstle.2008.24.3.147

The Effect of Oil Supply Pressure on the Performance of Vapor Cavitated Short Squeeze Film Dampers  

Jung, Si-Young (Dept. of Aircraft & Mechanical Engineering, Inha Technical College)
Publication Information
Tribology and Lubricants / v.24, no.3, 2008 , pp. 147-153 More about this Journal
Abstract
The effect of oil supply pressure on the performance of vapor cavitated short squeeze film dampers is examined. Vapor cavitation is characterized by film rupture occurring as a result of evaporating oils. The pressure of vapor cavity in the film is almost zero in absolute pressure and nearly constant. Pan's model about the shape of vapor cavity is utilized for studying the effect of vapor cavitation on the damping capability of a short squeeze film damper. As the level of oil supply pressure is increasing, vapor cavitation is suppressed so that the direct damping coefficient increases and the cross coupled damping coefficient decreases. Futhermore, the analysis of the unbalance responses of a rigid rotor supported on cavitated squeeze film dampers shows that a significant reduction in rotor amplitude and force transmissibility is possible by controlling the oil supply pressure into short squeeze film dampers.
Keywords
cavitation; damping; rotordynamics; squeeze film damper; vapor;
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