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Keywords: pressure
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Tribol. February 2024, 146(2): 024401.
Paper No: TRIB-23-1163
Published Online: November 2, 2023
... negative pressure zone (RNPZ) was found in the spiral groove gas face seal, and the evolution and action mechanism of RNPZ was investigated in detail, which may promote the above application. Three film thicknesses of spiral groove gas face seals at different rotational speeds and inlet pressures were...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Tribol. March 2022, 144(3): 031802.
Paper No: TRIB-20-1462
Published Online: June 8, 2021
.... Based on the flow conserving governing equations, this paper originally presents semi-empirical analytic equations of the leakage flow rate and tooth-clearance pressure for liquid-phase flow in the straight-through labyrinth seal. The equations indicate that the leakage and pressure are closely related...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Tribol. January 2010, 132(1): 014501.
Published Online: November 10, 2009
...T. V. V. L. N. Rao In this paper, pressure and shear stress are derived under steady state using one-dimensional analysis of the single-grooved slider bearing and journal bearing with partial slip on the stationary surface. The Reynolds boundary conditions are used in the analysis of journal...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Tribol. October 2008, 130(4): 041901.
Published Online: August 5, 2008
...Shuyu Zhang; Sung-Chang Lee; Dongman Kim; Joerg Ferber; Brian Strom; George Tyndall Thermomechanical actuation (TMA) at the transducer region of the air bearing surface (ABS) protrudes from the transducer toward the recording media. This actuation induces a change in the air bearing pressure...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 2008, 130(1): 011008.
Published Online: December 26, 2007
...Shuyu Zhang; Brian Strom; Sung-Chang Lee; George Tyndall For a hard disk drive operating in a humid environment, the water vapor in the slider’s air bearing is typically compressed beyond its saturation vapor pressure, causing the vapor to condense. Consequently, the air bearing pressure decreases...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Tribol. January 2007, 129(1): 205–208.
Published Online: July 3, 2006
... one. The wear after more than 2000 cycles was measured and used to generate numerical simulations. The aim here was to compare experimental data with theoretical results. It was observed that hydrodynamic pressure increases, whereas the temperature at the film/bush interface slightly decreases on both...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Tribol. January 2006, 128(1): 49–58.
Published Online: December 14, 2005
...S. B. Glavatskih; Michel Fillon Results of a combined theoretical and experimental investigation into the operation of thrust bearings with polytetrafluoroethylene (PTFE)-faced pads are reported. Bearing performance is analyzed in terms of temperature, power loss, oil film thickness and pressure...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Tribol. October 2005, 127(4): 884–889.
Published Online: April 29, 2005
...M. Bahrami; M. M. Yovanovich; J. R. Culham A new model is developed that considers the effect of roughness on the elastic contact of spherical bodies. A general pressure distribution is proposed that encompasses the contact of rough spheres and yields the Hertzian theory for ideally smooth surfaces...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2003, 125(2): 301–308.
Published Online: March 19, 2003
...Mathieu Helene; Mihai Arghir; Jean Frene The present work investigates the flow in the feeding recess of a hybrid journal bearing. Numerical integration of the complete Navier-Stokes equations was performed with an appropriate turbulence model. Of primary concern is the pressure field...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2003, 125(2): 260–266.
Published Online: March 19, 2003
..., and the magnitudes of tension achievable through different methods were compared. The use of viscosity data from liquids under tension to more accurately determine the initial pressure viscosity coefficient was investigated. The continuity of the pressure viscosity coefficient across absolute zero pressure...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. January 2003, 125(1): 76–90.
Published Online: December 31, 2002
... of the pressure and film thickness distributions in the contact area are discussed for the two stages of shut down process, namely the deceleration stage and the subsequent pure squeeze motion stage with zero entraining velocity. The nature of the balance between the pressure, the wedge and the squeeze terms...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. January 2003, 125(1): 60–69.
Published Online: December 31, 2002
... of seals for aircraft actuation assemblies in a broad range of temperatures (−55°C to +135°C) and sealed pressures (1–50 MPa or more). The model is used to calculate the contact pressures and film thickness maps as well as the leakage rates and friction for the dynamic or static contact between a seal...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. October 2002, 124(4): 822–828.
Published Online: September 24, 2002
... transition was attributable not to the wear-out of the silver plating, but to the increase of the contact pressure with increase of the number of oscillations, which was caused by the increase of sliding pair shape inconformity due to wear. Some sliding electric contact mechanisms have a structure...
Journal Articles
Publisher: ASME
Article Type: Technical Notes
J. Tribol. October 2002, 124(4): 858–863.
Published Online: September 24, 2002
...C. F. Kettleborough confined flow compressible flow flow simulation pressure force size effect mechanical engineering computing computational fluid dynamics When two circular discs are supplied with air under pressure through a central hole, the lower disc will be attracted...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2002, 124(2): 320–326.
Published Online: July 3, 2001
...M. Groper; I. Etsion, Fellow ASME An experimentally observed reverse flow phenomenon at the end tip of the cavitation zone of a submerged journal bearing is modeled and theoretically investigated. The shape of the cavity, the nature of the reverse flow and the pressure distribution in the bearing...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. April 2002, 124(2): 420–427.
Published Online: June 26, 2001
...M. Kaneta; R. Kawashima; S. Masuda; H. Nishikawa; P. Yang; J. Wang The effects of thermal conductivity and kinematics of contacting surfaces and viscosity-pressure coefficient on the film thickness in an elliptical contact under pure sliding conditions in which lubricant entrainment vector...
Journal Articles
Publisher: ASME
Article Type: Technical Notes
J. Tribol. January 2002, 124(1): 220–223.
Published Online: March 12, 2001
...S. Coulon,; F. Ville, and; A. A. Lubrecht Using a dry point contact model, a parametric study of the peak pressure due to a dent was performed. The parameters varied were the dent depth and diameter. The numerical analysis ws complemented by an analytical analysis. Using the elastic body hypothesis...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Tribol. January 2002, 124(1): 203–211.
Published Online: February 28, 2001
... which took account of non-uniform variations in the fluid film thickness. A solution procedure was devised whereby for a given set of adjustment conditions, simultaneously converged fields of fluid film thickness, temperature, viscosity and pressure would result, together with oil film forces. A wide...