.... The bearings are modeled as micro-channels, consisting of a smooth moving wall (rotor), and a stationary wall (stator) with partial periodic rectangular texturing. The flow field is calculated from the numerical solution of the Navier-Stokes equations for incompressible isothermal flow; processing...

...M. Arghir; F. Billy; G. Pineau; J. Frěne; A. Texier The present work presents a theoretical approach for the analysis of textured annular “damper” seals. The data for the seal were extracted from the work of Childs and Fayolle (ASME J. Tribol. 121(1), pp. 42–49) . The texture of the stator consists...

... flexibly mounted stator or rotor are also obtained as degenerate cases of the more general result. Synchronous shaft whirl is shown to have a significant effect on the steady-state response of all these seals, while not affecting the stability threshold. The steady-state response is obtained by solution...

... helium light source at the mounting, with a precision of ±0.075 μm/mm. The stator, made of a calcium fluoride CaF 2 disc, is fixed on an annular piston which ensures three degrees of freedom with respect to the frame. This enables a dynamic tracking of the rotor misalignment. 7...

...Mark Weatherwax, Machinery Engineer,; Dara W. Childs, Leland Jordan Professor of Mechanical Engineering, Test results for leakage and rotordynamic coefficients are presented for a honeycomb-stator/smooth-rotor annular seal for eccentricity ratios out to 0.5 using air as the test fluid. Tests were...

... of the mechanical face seal. Closed-form solutions are presented for the transient natural response to initial velocity conditions, the steady-state response to rotor runout and initial stator misalignment, the transmissibility ratios, and the stability threshold. Results from the closed-form solutions are all...

...Brad A. Miller; Itzhak Green The gas film stiffness and damping properties for a spiral grooved mechanical face seal in a flexibly mounted stator configuration are computed using the step jump method and a novel direct numerical frequency response method. The seal model has three degrees of freedom...

...Rohan J. D’Souza, Graduate Research Assistant; Dara W. Childs, Leland T. Jordan Professor of Mechanical Engineering A two-control-volume bulk-flow model is used to predict rotordynamic coefficients for an annular, honeycomb-stator/smooth-rotor gas seal. The bulk-flow model uses Hirs’ turbulent...