涨圈密封挤压油膜阻尼器流场与阻尼特性

为研究两端密封型挤压油膜阻尼器流场与阻尼特性,建立了涨圈密封挤压油膜阻尼器三维非定常流场数值仿真模型.基于Fluent软件中的Mixture多相流模型和Schnerr-Sauer空化模型数值模拟得到动态油膜压力与气相体积分数的周向分布规律.将计算得到的阻尼器油膜压力与文献中的试验数据对比,结果显示:两者具有较高的一致性...

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

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.