Volume 36 Issue 12
Dec.  2021
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CUI Ying, LUO Qiaodan, QIU Kai, HUNAG Yuxi. Flow field and damping characteristics of piston ring sealed squeeze film damper[J]. Journal of Aerospace Power, 2021, 36(12): 2474-2481. doi: 10.13224/j.cnki.jasp.20210445
Citation: CUI Ying, LUO Qiaodan, QIU Kai, HUNAG Yuxi. Flow field and damping characteristics of piston ring sealed squeeze film damper[J]. Journal of Aerospace Power, 2021, 36(12): 2474-2481. doi: 10.13224/j.cnki.jasp.20210445
shu

Flow field and damping characteristics of piston ring sealed squeeze film damper

doi: 10.13224/j.cnki.jasp.20210445

  • Naval Architecture and Ocean Engineering College，Dalian Maritime University，Dalian Liaoning 116026，China

  • Received Date: 2021-08-12
  • Publish Date: 2021-12-28
    Abstract
  • In order to study the flow field and damping characteristics of squeeze film damper sealed at both ends，a three-dimensional unsteady flow field numerical simulation model of squeeze film damper with piston ring seal was established.The circumferential oil film pressure distribution at different times was calculated based on the Mixture multiphase flow model and Schnerr-Sauer cavitation model in Fluent software，and compared with the experimental data in literature.The results showed that both were in good agreement.The average equivalent damping coefficient derived from the dynamic oil film force had only a deviation of 0.6% compared with the results identified by the impedance method，which verified the effectiveness of the numerical model.Further numerical calculations demonstrated that increasing the whirl amplitude，whirl frequency and the width of piston ring gap can aggravate the cavitation phenomenon in the flow field of the squeeze film damper and reduce the equivalent damping coefficient.

     

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