Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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The Effect of Oil Supply Pressure on the Performance of Vapor Cavitated Short Squeeze Film Dampers

증기 공동현상이 발생하는 무한 소폭 스퀴즈 필름 댐퍼 성능과 오일 공급압력의 영향

  • Jung, Si-Young (Dept. of Aircraft & Mechanical Engineering, Inha Technical College)
  • 정시영 (인하공업전문대학 항공기계과)
  • Published : 2008.06.30
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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.

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References

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