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Keywords: machine bearings
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Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052509.
Published Online: March 1, 2012
... stiffnesses and added mass coefficients; the latter was previously ignored or largely under predicted. 21 06 2011 22 06 2011 01 03 2012 01 03 2012 compressors finite element analysis hydrodynamics lubricating oils machine bearings rotors Oil seals are used...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052505.
Published Online: February 29, 2012
..., agreeing with dynamic measurements. Static stiffness measurements showed good agreement with the loaded, direct dynamic stiffness coefficients. 12 05 2011 12 05 2011 29 02 2012 29 02 2012 damping dynamic testing elasticity machine bearings rotors Tilting-pad journal...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052503.
Published Online: February 23, 2012
... 2010 22 09 2011 23 02 2012 23 02 2012 compressors gas turbines machine bearings rotors vibration measurement Rotordynamic instability is a self-excited vibration phenomenon which can result due to aerodynamic labyrinth seal forces, internal friction damping within...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052501.
Published Online: February 15, 2012
... compared to the values at room temperature. 13 04 2011 09 09 2011 15 02 2012 15 02 2012 computational fluid dynamics cooling damping elasticity gas turbine power stations gas turbines hydrodynamics impellers machine bearings perturbation techniques rotors shafts...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032506.
Published Online: January 4, 2012
... flow rate from the compressor increased from 21 to 74 g/s. The average TC compressor exit power was estimated at ∼34% of the turbine inlet power over this range. 31 03 2011 18 07 2011 04 01 2012 04 01 2012 compressors diesel engines heat transfer machine bearings...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032502.
Published Online: December 28, 2011
... 2011 28 12 2011 28 12 2011 abrasion aerodynamics aerospace components aerospace propulsion friction machine bearings rotors turbomachinery hybrid air foil bearing oil-free aero-propulsion Air/gas foil bearings (AFBs) have shown promise in high-speed micro...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022504.
Published Online: December 20, 2011
... convection lubrication machine bearings rotors Tilting pad journal bearings are commonly used in rotating machinery due to their inherent stability properties [( 1 2 )] Hence, an important amount of effort has been put during the last four decades in order to improve the quality and accuracy...
Journal Articles
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. February 2012, 134(2): 024501.
Published Online: December 8, 2011
... bearing support than those at the left edge. The paper presents test data along with detailed test GFB/shaft geometries and material properties. 31 03 2011 16 05 2011 08 12 2011 08 12 2011 machine bearings motor drives strain gauges temperature measurement turbomachinery...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2012, 134(1): 012502.
Published Online: October 27, 2011
.... 12 04 2011 17 04 2011 27 10 2011 27 10 2011 damping elastic constants machine bearings net structures (mechanical) rotors stainless steel Gas foil bearings (GFBs) have been considered as alternatives to traditional bearings due to increasing needs for high speed...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2011, 133(11): 112501.
Published Online: May 13, 2011
... damping elastic constants impact (mechanical) machine bearings rotors stress analysis turbomachinery The metal mesh foil bearing (MMFB) is a novel gas bearing technology that aims to provide reliable support in microturbomachinery ( < 0.5   MW ) operating at high speed...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2011, 133(10): 102504.
Published Online: May 6, 2011
... this measurement by developing a patented, high-frequency, high-amplitude shaker system, resulting in excitation over most of the subsynchronous range. 10 05 2010 09 08 2010 06 05 2011 06 05 2011 damping design engineering machine bearings mechanical testing rotors turbomachinery...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2011, 133(9): 092503.
Published Online: April 19, 2011
... coefficients and within 30% for the direct damping coefficients. 09 05 2010 31 07 2010 19 04 2011 19 04 2011 lubrication machine bearings machine testing rotors turbomachinery Tilting pad journal bearings (TPJBs) are widely used in the turbomachinery industry to help...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2011, 133(9): 092501.
Published Online: April 14, 2011
... and enable the calculation of natural frequencies. The experimental results show that the dynamic characteristics of the tested bearing have a weak dependence on the rotation speed but vary with the excitation frequency. 08 05 2010 25 05 2010 14 04 2011 14 04 2011 machine bearings...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 082504.
Published Online: April 8, 2011
... for optimization purposes. 06 07 2010 19 07 2010 08 04 2011 08 04 2011 computational fluid dynamics laser Doppler anemometry lubrication machine bearings shafts bearing chamber aero engine air-oil-flow porous media CFD To a large extent, the design of bearing...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 082503.
Published Online: April 6, 2011
... 08 2009 06 04 2011 06 04 2011 damping machine bearings rockets rotors turbomachinery Tilting pad (TP) journal bearings have long been the bearing of choice for high-speed turbomachines. The inherent stability of the bearing gives it substantial advantages over fixed-arc...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. June 2011, 133(6): 062501.
Published Online: February 17, 2011
... II) compares the measured bearing temperatures and the rotor response amplitudes to predictions. 09 04 2010 15 04 2010 17 02 2011 17 02 2011 cooling gas turbines machine bearings rotors shafts temperature measurement Gas foil bearings (GFBs) enable...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. June 2011, 133(6): 062502.
Published Online: February 17, 2011
..., benchmarked by the measurements, furthers the application of GFBs in high temperature oil-free rotating machinery. 09 04 2010 15 04 2010 17 02 2011 17 02 2011 gas turbines heat transfer machine bearings rotors shafts thermal expansion thermal management (packaging...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2011, 133(4): 042501.
Published Online: November 18, 2010
... excitations. 04 11 2009 21 06 2010 18 11 2010 18 11 2010 aerospace components aerospace engines damping design engineering elasticity finite difference methods friction hydrostatics machine bearings orifices (mechanical) turbomachinery air foil thrust bearing...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2011, 133(3): 032503.
Published Online: November 12, 2010
... fluid dynamics heat transfer machine bearings pipe flow temperature distribution two-phase flow vents (mechanical components) Advanced aircraft engine development dictates high standards of reliability for the lubrication systems not only in terms of the proper lubrication of the bearings...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2011, 133(3): 032501.
Published Online: November 11, 2010
... machine bearings turbomachinery Implementing gas foil bearings (GFBs) in high power density microturbomachinery ( < 250   kW ) increases mechanical efficiency, reliability, and operating life while reducing system complexity and maintenance costs ( 1 ). A radial foil bearing...