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Keywords: elasticity
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052505.
Published Online: February 29, 2012
... testing elasticity machine bearings rotors Tilting-pad journal bearings (TPJBs) are commonly used in rotating machines because of their substantial stability benefits over conventional, fixed-geometry journal bearings. TPJBs have multiple pads that rotate to balance fluid film forces, directing...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. February 2012, 134(2): 022503.
Published Online: December 14, 2011
... . Seal (synchronous) stiffness and damping coefficients versus inlet gas volume fraction (β S ). Mixture N 2 in ISO VG 2 oil (Δ P  = 71 bar, 10 krpm). 11 04 2011 13 04 2011 14 12 2011 14 12 2011 bubbles elasticity flow instability hydrocarbon reservoirs laminar...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2011, 133(12): 122401.
Published Online: August 31, 2011
... is presented to illustrate the associated dynamic phenomena and fluid-structure interaction within the internal assembly of the check valve. 08 04 2011 09 04 2011 31 08 2011 31 08 2011 compressors elasticity flow instability fluid oscillations hydrodynamics nozzles springs...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. December 2011, 133(12): 122502.
Published Online: August 26, 2011
.... Here we applied the elastic aerodynamic force assumption [( 5 )] and adopted the assumption that the mistuning is not so severe so that { Φ } is a constant among all blades. Structural damping ξ and external excitation forces, such as wake passing, are ignored for simplicity...
Journal Articles
Publisher: ASME
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
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. April 2010, 132(4): 042503.
Published Online: January 26, 2010
... the fundamental elastic mode. C eq hybrid brush seal equivalent viscous damping coefficient (Ns m) C α β test system viscous damping coefficient (Ns m); α , β : x , y C s α β predicted seal viscous damping coefficient (Ns m...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2010, 132(3): 032503.
Published Online: December 3, 2009
...Luis San Andrés; Thomas Abraham Chirathadam; Tae-Ho Kim Engineered metal mesh foil bearings (MMFBs) are a promising low cost bearing technology for oil-free microturbomachinery. In a MMFB, a ring shaped metal mesh provides a soft elastic support to a smooth arcuate foil wrapped around a rotating...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2009, 131(4): 042903.
Published Online: April 15, 2009
... to the crack. Anisotropic elasticity and crystal plasticity constitutive models are employed at the grain size scale. It is shown that the standard deviation of the crack tip opening displacement decreases from about 20% for a short surface crack embedded within a single grain to about 7% for a surface crack...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2009, 131(2): 022505.
Published Online: December 23, 2008
..., in which dampers and blades constitute the unconstrained and constrained structures, respectively. The model of the unconstrained/free structure includes six rigid body modes and several elastic modes, the number of which depends on the excitation frequency. In other words, the motion of the free structure...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2009, 131(2): 022802.
Published Online: December 18, 2008
... to the injection-pump actuation timing, the fuel-injection rate, the fuel-injection duration, and the injection spray atomization. The primary fuel temperature effects on the injection parameters are from the fuel bulk modulus of elasticity and the density with the fuel viscosity less significant as the injector...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2009, 131(1): 012802.
Published Online: November 20, 2008
... temperature, and thermal stress. This model provides insights into the complicated DPF working mechanism, and it can be used as design tools to reduce filter pressure drop while enhance its short term and long term durability. 17 04 2007 20 05 2008 20 11 2008 diesel engines elasticity...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2008, 130(5): 051505.
Published Online: June 16, 2008
... Combustion System Due to an Acoustic Field ,” Proceedings of the International Forum on Aeroelasticity and Structural Dynamics , Amsterdam, The Netherlands . Huls , R. A. , 2006 , “ Acousto-Elastic Interaction in Combustion Chambers ,” Ph.D. thesis, University of Twente, The Netherlands...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2008, 130(2): 022502.
Published Online: February 25, 2008
... for any level of refinement required for modeling of elastic damper bodies and for modeling of friction contact interactions. Numerical studies of realistic bladed disks have been performed with three different types of underplatform dampers: (i) a “cottage-roof” (also called “wedge”) damper, (ii) seal...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2007, 129(3): 865–869.
Published Online: September 1, 2006
..., turbulent oil flow, and elastic effects, including that of pad flexibility. The analyzes of the TPJB’s stiffness and damping properties showed that the frequency effects on the bearing dynamic properties depend on the operating conditions and bearing design. It has been concluded that the pad inertia...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2007, 129(2): 530–541.
Published Online: August 7, 2006
... analysis fluid oscillations turbines rotors blades elasticity flow separation The designing and maintaining of flutter-free gas turbine engines remains one of the paramount challenges for engine manufacturers. Flutter denotes a self-excited and self-sustained instability phenomenon that might...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2006, 128(3): 626–633.
Published Online: June 13, 2006
.... Manuscript received by IGTI, Oct. 2002, final revision, Mar. 2003. Associated Editor: H. R. Simmons. 16 June 2003 01 Oct 2002 01 Mar 2003 13 06 2006 machine bearings foils damping friction wear rotors mechanical stability elasticity gas turbines machine testing...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2005, 127(3): 654–662.
Published Online: December 13, 2004
... + β l l ω 0 k 2 ) Using the sum of the elastic and kinetic energies as Ljapounov function, it can be shown that the positive definiteness of the “damping” matrix is a sufficient condition for stability. This condition is necessary, according to the inequality of Eq. 19 , only...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 167–174.
Published Online: December 27, 2002
... survey of the rotordynamic behavior of labyrinths. seals (stoppers) gas turbines rotors flow simulation perturbation theory stability elasticity pressure 04 June 2001 01 Dec 2000 01 Mar 2001 27 12 2002 Contributed by the International Gas Turbine Institute...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 1003–1010.
Published Online: September 24, 2002
... engines aerospace testing parameter space methods aerodynamics compressible flow stability elasticity damping To assure reliability and safety of jet propulsion, the potential for blade flutter must be eliminated from the turbomachinery stages. The current predictive models for aeroengine...