A bulk-flow analysis of static and dynamic characteristics of floating ring seals
A bulk-flow analysis of static and dynamic characteristics of floating ring seals
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DOI：
10.1016/j.triboint.2006.04.010
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发表时间：
2007-03
影响因子：
6.2
通讯作者：
W. Duan;F. Chu;C. Kim;Yong-Bok Lee
中科院分区：
文献类型：
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作者：
W. Duan;F. Chu;C. Kim;Yong-Bok Lee
采用整体流动模型计算浮环密封的静态和动态特性，因为基于完整Navier-Stokes方程的数值积分的解决方案可能非常耗时。最速下降法用于有效地找到密封的平衡位置。在偏心工况下，整体流动模型由三个偏微分方程控制。采用有限差分法求解非线性控制方程。与纳尔逊和Nguyen的快速傅立叶变换方法相比，该方法具有更好的一致性。扰动分析的流量变量产生一组零阶和一阶方程。SIMPLE算法用于积分整体流动方程组。数值预测（锁定偏心率，泄漏流量和转子动力学系数）与哈的结果，这是制定使用傅立叶级数，和实验数据的比较随后。
The bulk-flow model was used to calculate the static and the dynamic characteristics of floating ring seals because the solutions based on the numerical integration of the complete Navier–Stokes equations can be very time consuming. A steepest-descent method is used to find the seal's equilibrium position efficiently. The bulk-flow model is governed by three partial differential equations on eccentric working conditions. A finite-difference scheme has been used to solve the nonlinear governing equations. Compared to Nelson and Nguyen's fast fourier transform method, this scheme has better consistency. Perturbation analysis of the flow variables yields a set of zeroth and first-order equations. The SIMPLE algorithm is used to integrate the system of bulk-flow equations. Comparisons of the numerical predictions (lock-up eccentricity ratio, leakage flow rate and rotordynamic coefficients) with Ha's results, which were formulated using the Fourier series, and experimental data are presented subsequently.