Dynamic and Static Characteristics of Wavy Annular Seals in Turbulent Flow
Dynamic and Static Characteristics of Wavy Annular Seals in Turbulent Flow
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DOI：
10.2474/trol.5.7
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发表时间：
2010-01
期刊：
影响因子：
1
通讯作者：
S. S. Gautam-S.;M. Ghosh
中科院分区：
文献类型：
--
作者：
S. S. Gautam-S.;M. Ghosh
本文介绍了利用湍流润滑理论确定圆周波几何环形密封件的泄漏流量和动态特性的理论分析结果。基于涡粘模型的湍流润滑方程已被用来开发湍流雷诺方程。使用扰动方法将对流流体惯性效应纳入湍流润滑中。为了确定刚度、阻尼和涡动比等动态特性，采用了轴颈中心小振幅振动的摄动理论。一般来说，已经发现圆周波几何形状改善了环形密封件在较高速度下的性能并且增加了L/D和锥度比。
This paper presents results of a theoretical analysis to determine the leakage flow and dynamic characteristics of circumferential wave geometry annular seals using turbulent lubrication theory. Turbulent lubrication equations based on an eddy viscosity model have been used to develop the turbulent Reynolds equation. Convective fluid inertia effects have been incorporated using the perturbation approach in turbulent lubrication. To determine the dynamic characteristics i.e. stiffness, damping and whirl ratio, perturbation theory for small amplitude vibration of the journal center has been adopted. In general, it has been found that circumferential wave geometry improves the performance of the annular seal at higher speeds and increases in the L/D and taper ratios.