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Keywords: lubrication
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Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2022, 144(3): 031003.
Paper No: GTP-21-1369
Published Online: December 6, 2021
.... The bearings have a bore diameter of 60 mm and 90 mm, respectively. Jet and under-race lubrication techniques have been used to supply oil to the bearings under test. The custom-made aero-engine test bearing features special channels to allow under-race lubrication of the rollers/races contacts as well...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032802.
Published Online: January 4, 2012
...S. Adnan Qasim; M. Afzaal Malik; M. Ali Khan; R. A. Mufti A fully established elastohydrodynamic lubricating (EHL) film between the piston and the liner surfaces during normal engine operation minimizes piston slap and prevents adhesive wear. Wear cannot be prevented in the initial engine start up...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022504.
Published Online: December 20, 2011
...Alejandro Cerda Varela; Ilmar Ferreira Santos This work is aimed at a theoretical study of the dynamic behavior of a rotor-tilting pad journal bearing (TPJB) system under different lubrication regimes, namely, thermohydrodynamic (THD), elastohydrodynamic (EHD), and hybrid lubrication regime...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2011, 133(9): 092503.
Published Online: April 19, 2011
...Adolfo Delgado; Giuseppe Vannini; Bugra Ertas; Michael Drexel; Lorenzo Naldi This paper presents the identification of the rotordynamic force coefficients for direct lubrication five-pad and four-pad tilting pad bearings. The bearing is 110 mm in diameter with a L/D of 0.4 pad axial length (44 mm...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 082504.
Published Online: April 8, 2011
...J. Aidarinis; D. Missirlis; K. Yakinthos; A. Goulas The continuous development of aero engines toward lighter but yet more compact designs, without decreasing their efficiency, has led to gradually increasing demands on the lubrication system, such as the bearing chambers of an aero engine...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2010, 132(9): 092807.
Published Online: June 18, 2010
... resolved measurement of the forces on the cylinder along three axes—in the axial direction, the thrust direction, and along the wrist pin. Three different lubricants with differing properties were tested to observe the friction characteristics of each. The experimental results showed that the floating...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2010, 132(3): 032805.
Published Online: November 30, 2009
...Moussa Diaby; Michel Sablier; Anthony Le Negrate; Mehdi El Fassi On the basis of ongoing research conducted on the clarification of processes responsible for lubricant degradation in the environment of piston grooves in exhaust gas recirculation (EGR) diesel engines, an experimental investigation...
Journal Articles
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. May 2009, 131(3): 034503.
Published Online: February 10, 2009
...Yaguo Lu; Zhenxia Liu; Shengqin Huang; Tao Xu A software, general analysis software of aero-engine lubrication system ( GASLS ), for simulating aero-engine lubrication system is presented. The software is capable of analyzing the flow, pressure, and temperature distribution in the lubrication...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2008, 130(6): 062501.
Published Online: August 21, 2008
...Manish Kumar; Daejong Kim Airfoil bearings offer many advantages over oil-lubricated bearings, but they have reliability issues during start∕stops (wear) and limited heat dissipation capability. To address these issues, a hybrid airfoil bearing (HAFB) combining hydrodynamic airfoil bearing...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2006, 128(3): 634–643.
Published Online: June 13, 2006
... 13 06 2006 rotors machine bearings turbomachinery gas turbines prediction theory eigenvalues and eigenfunctions damping lubrication mechanical stability machine testing Gas-lubricated bearings, as opposed to oil-lubricated bearings, offer many advantages for application...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2006, 128(1): 178–182.
Published Online: May 1, 2005
... to carry out a survey aiming to reduce power losses in bearing chambers. The test bearing was a 124 mm PCD ball bearing with a split inner ring employing under-race lubrication by two individual jets. The survey was carried out in two parts. In the first part, the investigations were focused on the impact...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2005, 127(1): 197–205.
Published Online: February 9, 2005
... by the ASME Headquarters March 12, 2004. Associate Editor: D. Assanis. 20 January 2003 12 March 2004 09 02 2005 engines ball bearings friction lubrication thermal properties heat transfer mechanical contact rotation The study reported here is concerned with friction...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2004, 126(4): 848–854.
Published Online: November 24, 2004
...Ilmar F. Santos; Rodrigo Nicoletti; Alexandre Scalabrin In this paper the complete set of modified Reynolds’ equations for the active lubrication is presented. The solution of such a set of equations allows the determination of stiffness and damping coefficients of actively lubricated bearings...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2003, 125(4): 1003–1010.
Published Online: November 18, 2003
... processes at rotating radial holes (Glahn, A. et al., 2001, “Disintegration of Oil Films Emerging From Radial Holes Inside a Cylinder,” ASME Paper No. 2001-GT-0202) and has used the same approaches in simulating one of the droplet generation sources in aeroengine lubrication systems. Both papers aim...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2003, 125(4): 1081–1089.
Published Online: November 18, 2003
... of an axial bore profile on radial dynamics of a ring is investigated. Radial ring motions within grooves due to the axial bore profile can generate significant inertial effects and also have an impact on ring end-gap sizes and lubrication conditions at the ring-liner interfaces. The magnitude of such effects...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2003, 125(3): 820–826.
Published Online: August 15, 2003
... similar engines were operated using optimum biodiesel blend and mineral diesel oil, respectively. These were subjected to long-term endurance tests. Lubricating oil samples drawn from both engines after a fixed interval were subjected to elemental analysis. Quantification of various metal debris...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2003, 125(2): 596–603.
Published Online: April 29, 2003
... engines lubrication liquid films size effect high-temperature effects temperature distribution heat transfer viscosity One method utilized to promote energy savings in internal combustion engines is to reduce the power loss caused by mechanical friction on lubricated surfaces of engines...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 95–101.
Published Online: December 27, 2002
... 2002 turbogenerators machine bearings rotors lubrication seals (stoppers) vibrations failure analysis Turbochargers are a special class of turbomachinery used to increase engine power by providing compressed air for combustion. They can typically be found on diesel engines, which...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 75–80.
Published Online: December 27, 2002
... actuators are introduced into the equations of the lubricant, resulting in a new form of Reynolds’ equation for active lubrication. The global model of the system is obtained by coupling the equation of motion of the rigid rotor with the stiffness and damping of the active oil film. This global model...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 1032–1041.
Published Online: September 24, 2002
..., and the use of cryogenics as lubricants. The importance of using appropriate simulators that duplicate the actual equipment in evaluating the application of compliant bearings is demonstrated via two specific examples; one, a simulator to evaluate bearings for an air cycle machine and another for an advanced...