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Keywords: friction
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 112806.
Paper No: GTP-18-1203
Published Online: July 9, 2018
... received May 10, 2018; final manuscript received May 10, 2018; published online July 9, 2018. Editor: David Wisler. 10 05 2018 10 05 2018 Engines Friction Internal combustion engines Wear Electroplated soft metal overlays were first applied to copper-based engine bearing...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2018, 140(11): 112501.
Paper No: GTP-18-1130
Published Online: July 5, 2018
... experimental facilities [ 1 , 2 ], the presented test rig offers an original architecture where nonsynchronous dynamic displacements are imposed to the shaft [ 3 , 4 ]. Experimental Friction Shear Flows Wear The dynamic displacements of the rotor imposed by the shakers generate fluid forces...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2018, 140(10): 102603.
Paper No: GTP-17-1513
Published Online: June 25, 2018
... accompanied by erosion problems. Further liquid is deposited on the surface of the blade and forms a wall film. The presence of a wall film on the blade changes the friction coefficient and leads to an increase of the effective sand grain roughness of the surface [ 2 ]. For an accurate prediction...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. July 2018, 140(7): 072802.
Paper No: GTP-17-1569
Published Online: April 20, 2018
... to instantaneous lubricant film thickness. Then, the photomultiplier signal is calibrated for lubricant film thickness using a laser textured cylinder bore with known geometries. Additional marks were etched on the liner for calibration. The LIF system is adapted to a piston ring and cylinder bore friction test...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2018, 140(6): 062505.
Paper No: GTP-17-1539
Published Online: April 5, 2018
... (to the contact interface) DOFs, refer to Fig. 5( b ) x = generic harmonic index θ R , θ L = platform angles, right and left (deg) μ R , μ L = friction coefficients, right and left sides ω = excitation frequency (rad) Subscripts B = blade C = contact D...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2018, 140(5): 052505.
Paper No: GTP-17-1273
Published Online: January 3, 2018
...Giuseppe Battiato; Christian M. Firrone; Teresa M. Berruti; Bogdan I. Epureanu Most aircraft turbojet engines consist of multiple stages coupled by means of bolted flange joints which potentially represent source of nonlinearities due to friction phenomena. Methods aimed at predicting the forced...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2018, 140(2): 022301.
Paper No: GTP-17-1253
Published Online: October 3, 2017
...Mario Schinnerl; Jan Ehrhard; Mathias Bogner; Joerg Seume The measured performance maps of turbochargers (TCs), which are commonly used for the matching process with a combustion engine, are influenced by heat transfer and friction phenomena. Internal heat transfer from the hot turbine side...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2018, 140(1): 012507.
Paper No: GTP-17-1286
Published Online: September 19, 2017
... URBINES AND P OWER . Manuscript received July 5, 2017; final manuscript received July 5, 2017; published online September 19, 2017. Editor: David Wisler. 05 07 2017 05 07 2017 Aerospace applications Friction Gas turbine technology Wear Foil bearings (FB) using air or gas...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2017, 139(6): 062505.
Paper No: GTP-16-1428
Published Online: February 1, 2017
...-dependent coefficients. As shown in Fig. 4 , the Lomakin-effect pressure distributions create a reaction force via a trade-off in the seal pressure drop between the inlet loss and friction-factor losses along the seal's walls. Except for the dependence of Δ P on ω , the centering force due to the direct...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2017, 139(6): 062801.
Paper No: GTP-16-1220
Published Online: January 24, 2017
... in an internal combustion (IC) engine can be divided into thermal and parasitic as well as due to gas leakage because of untoward compression ring motions. Frictional losses are particularly of concern at low engine speeds, assuming a greater share of the overall losses. Piston–cylinder system accounts...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2017, 139(3): 031202.
Paper No: GTP-16-1337
Published Online: October 11, 2016
... matrix n = subscript relative to the n th time step of the time integration procedure p = superscript relative to predicted quantities μ = friction coefficient Ω = angular speed 1B = first bending mode of the blade 1T = first torsion mode of the blade 2B...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2017, 139(3): 032502.
Paper No: GTP-16-1320
Published Online: October 4, 2016
... to a contact of the bristles and the rotor surface. Besides abrasive wear occurrence, the friction between the bristles and the rotor leads to heat generation which can be detrimental to turbine operation due to thermal effects, leading to rotor bending connected to increasing shaft vibrations. In order...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2017, 139(2): 022508.
Paper No: GTP-16-1263
Published Online: September 20, 2016
...E. P. Petrov An efficient method is proposed for the multiharmonic frequency-domain analysis of the stability for nonlinear periodic forced vibrations in gas turbine engine structures and turbomachines with friction, gaps, and other types of nonlinear contact interfaces. The method allows using...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2017, 139(2): 022505.
Paper No: GTP-16-1240
Published Online: September 13, 2016
..., the motion at the frictional interfaces can lead to a highly nonlinear dynamic response and cause fretting wear at the contact. The latter will change the contact conditions of the interface and consequently impact the nonlinear dynamic response of the entire assembly. Accurate prediction of the nonlinear...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2017, 139(1): 011504.
Paper No: GTP-15-1469
Published Online: August 30, 2016
... and RI mode increases slightly in comparison to that of CC mode, and these three boundary lubrication durations are almost same. However, the thickness of lubricant film between friction pair of three modes is quite different, resulting in their different tribological properties. Among these parameters...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2017, 139(1): 012504.
Paper No: GTP-16-1229
Published Online: August 16, 2016
... selected (i.e., pre-optimized) in such a way that those parameter combinations leading to undesirable damper behavior are ruled out a priori: —ensure that damper jamming is avoided by ruling out the undesirable combinations of platform and friction angles; —ensure that damper lift-off is avoided through...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2016, 138(10): 102502.
Paper No: GTP-16-1033
Published Online: April 12, 2016
... of bifurcations in realistic gas-turbine structures with friction contacts and with cubic nonlinearity has been shown. References [1] Sanliturk , K. Y. , Imregun , M. , and Ewins , D. J. , 1997 , “ Harmonic Balance Vibration Analysis of Turbine Blades With Friction Dampers ,” ASME J. Vib...