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Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2018, 140(10): 102603.
Paper No: GTP-17-1513
Published Online: June 25, 2018
... coatings are applied resulting in contact angles of 51–95 deg. The inflow Mach number was fixed at design inflow Mach number, and the inflow angle was varied over a broad range. The effect on the water film pattern is analyzed in terms of position of film breakup, rivulet width, and totally wetted surface...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 082505.
Paper No: GTP-17-1614
Published Online: April 26, 2018
... viscosity together with flow viscosity forms the effective viscosity, which is the coefficient of the shear stress in the film. The turbulence model and Reynolds equation are bound together to solve when hydrodynamic analysis is performed, therefore improving the accuracy of the turbulence model is also...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2018, 140(7): 072802.
Paper No: GTP-17-1569
Published Online: April 20, 2018
...Yunus Emre Ayranci; Ozgen Akalin Measurement of film thickness between piston ring and cylinder bore has been a challenge for decades; laser-induced fluorescence (LIF) method was used by several groups, and promising results are obtained for the investigation of lubricant film transport...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. August 2018, 140(8): 082501.
Paper No: GTP-17-1106
Published Online: April 12, 2018
... to improve the performance of the overall system. This could potentially be implemented in all rotordynamic systems supported by AMBs and subjected to seal forces or other fluid film forces. Contributed by the Structures and Dynamics Committee of ASME for publication in the J OURNAL OF E NGINEERING...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2018, 140(7): 072503.
Paper No: GTP-17-1107
Published Online: April 10, 2018
... manuscript received July 3, 2017; published online April 10, 2018. Editor: David Wisler. 21 03 2017 03 07 2017 Film Natural gas technology High performance turbomachinery requires bearings that can operate at high surface speeds. Typical oil lubricated and rolling element...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2018, 140(6): 062401.
Paper No: GTP-17-1419
Published Online: February 27, 2018
... clearance increases as the supply pressure increases and decreases quickly as the applied load increases. The reduction in clearance increases the flow resistance across the film lands, thus reducing the through flow rate with an increase in recess pressure. In addition, an estimated bearing axial stiffness...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 052506.
Paper No: GTP-17-1382
Published Online: January 3, 2018
... that direct lubrication TPJBs exhibit unexpected shaft vibrations with a broadband low frequency range, albeit small in amplitude. Published industrial practice demonstrates the inlet lubrication type, a reduced supply flow rate causing film starvation, and the bearing discharge conditions (evacuated or end...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 051601.
Paper No: GTP-17-1295
Published Online: December 27, 2017
...Craig Nolen; Melissa Poerner The distribution of water in the diffuser of a wet gas compressor is not well understood. Measurements of water film thickness across the diffuser surface would improve the understanding of two-phase flow phenomena in wet gas compressors. Electromagnetic probes were...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 032601.
Paper No: GTP-17-1185
Published Online: October 17, 2017
... as well as placement within the bearing chamber. This work has assumed two extremes of flow regime: wall film and airborne droplets. In reality, depending on how the oil enters the chamber, the flow in an aero-engine chamber will be some kind of combination of both. The baseline study shows...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2018, 140(3): 032602.
Paper No: GTP-17-1189
Published Online: October 17, 2017
...Pietro Rossi; Asad Raheem; Reza S. Abhari Formation of thin liquid films on steam turbine airfoils, particularly in last stages of low-pressure (LP) steam turbines, and their breakup into coarse droplets is of paramount importance to assess erosion of last stage rotor blades given by the impact...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 012502.
Paper No: GTP-17-1250
Published Online: September 19, 2017
...Luis San Andrés; Sean Den; Sung-Hwa Jeung Gas turbine aircraft engine manufacturers push for simple squeeze film damper (SFD) designs, short in length, yet able to provide enough damping to ameliorate rotor vibrations. SFDs employ orifices to feed lubricant directly into the film land...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2017, 139(5): 051601.
Paper No: GTP-16-1348
Published Online: January 4, 2017
...Guanghua Wang; Gustavo Ledezma; James DeLancey; Anquan Wang Gas turbines overall efficiency enhancement requires further increasing of the firing temperature and decreasing of cooling flow usage. Multihole (or effusion, or full-coverage) film cooling is widely used for hot gas path components...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2017, 139(4): 042503.
Paper No: GTP-16-1306
Published Online: November 2, 2016
... to static angular misalignments of the TC and BG surfaces that affect the operating film thickness as well as the force and reaction moments of the lubricated mechanical element. In a follow-up to San Andrés et al. (2015, “On the Predicted Performance of Oil Lubricated Thrust Collars in Integrally Geared...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2017, 139(3): 031505.
Paper No: GTP-16-1287
Published Online: September 27, 2016
... removing the film and effusion cooling jet geometry from the liner while retaining the cooling hole imprints on the liner. The PAPRICO can operate under two modalities, viz., two-sided and one-sided. For the two-sided PAPRICO model, the imprints are kept on the plenum and combustor sides of the liner...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2017, 139(2): 022501.
Paper No: GTP-15-1404
Published Online: September 13, 2016
... manuscript received August 28, 2015; published online September 13, 2016. Editor: David Wisler. 11 08 2015 28 08 2015 Aerodynamics Film Modeling The general working principle for foil gas bearing is as follows: when journal starts to rotate, air is drawn into the bearing via...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2017, 139(1): 012506.
Paper No: GTP-16-1245
Published Online: September 8, 2016
... FOR G AS T URBINES AND P OWER . Manuscript received June 20, 2016; final manuscript received June 28, 2016; published online September 8, 2016. Editor: David Wisler. 20 06 2016 28 06 2016 Computational fluid dynamics Droplet Film Fluids Modeling Multiphase flows Periodic...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2016, 138(12): 122503.
Paper No: GTP-16-1210
Published Online: August 2, 2016
...Luis San Andrés; Sean Den; Sung-Hwa Jeung Commonly employed in air breathing (gas turbine) engines, squeeze film dampers (SFDs) reduce the amplitude of rotor vibration while traversing system critical speeds or in transient events such as during a maneuver load, a hard landing, a blade loss...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2016, 138(11): 112501.
Paper No: GTP-16-1105
Published Online: May 24, 2016
...Bruce Kakimpa; Herve Morvan; Stephen Hibberd Thin-film flows encountered in engineering systems such as aero-engine bearing chambers often exhibit capillary waves and occur within a moderate to high Weber number range. Although the depth-averaged simulation of these thin-film flows...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2015, 137(12): 122502.
Paper No: GTP-14-1277
Published Online: June 9, 2015
...Yin Song; Chun-wei Gu Computational fluid dynamics (CFD) analysis, which solves the full three-dimensional (3D) Navier–Stokes equations, has been recognized as having promise in providing a more detailed and accurate analysis for oil-film journal bearings than the traditional Reynolds analysis...
Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2015, 137(12): 122501.
Paper No: GTP-14-1684
Published Online: June 2, 2015
...Zhao Jingyu; Liu Zhenxia The oil film thickness on the bearing chamber wall directly affects the wall heat transfer efficiency, so a fundamental study on the motion of oil film on the rotating cylinder has been conducted to this end. On the one hand, the rotating cylinder test rig was designed...