A bulk-flow analysis of static and dynamic characteristics of floating ring seals

Wenbo Duan, Fulei Chu, Chang Ho Kim, Yong Bok Lee

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)470-478
Number of pages9
JournalTribology International
Issue number3
Publication statusPublished - 1 Mar 2007


  • Bulk flow analysis
  • Floating ring seals
  • Static and dynamic characteristics


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