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Keywords: rotordynamics
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Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2025, 147(2): 021027.
Paper No: GTP-24-1501
Published Online: October 26, 2024
... rocket engines. Rotor run-up and speed coast-down tests are conducted to measure shaft motion responses. The results clearly demonstrate that the rotordynamic characteristics of the test rotor supported on the hybrid journal bearings largely rely on properties of the test fluids and their feeding...
Journal Articles
Abdelrahman Abdeldayem, Andrea Paggini, Tommaso Diurno, Claudio Orazi, Martin White, Marco Ruggiero, Abdulnaser Sayma
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2024, 146(2): 021011.
Paper No: GTP-23-1302
Published Online: November 2, 2023
... and footprint, turbine efficiency, and rotordynamics. Rotordynamic stability is assessed considering the high fluid density and related cross coupling effects. Finally, shaft end sizing, cooling system design, and the integration of dry gas seals are discussed. References [1]
White ,
M. T...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. May 2023, 145(5): 051019.
Paper No: GTP-22-1478
Published Online: January 10, 2023
..., facing large pressure differentials along with significant changes in gas density, produce sizeable lateral forces that impact compressor stability and rotordynamic performance. There is extensive archival data on the dynamic forced performance of LS and textured surface seals. However, the experimental...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2023, 145(4): 041012.
Paper No: GTP-22-1403
Published Online: December 13, 2022
... challenge in SFD design and operation; namely, quantifying the amount of air ingested and its effect on the damper forced performance. e-mail: Bonjin.koo@daikinapplied.com e-mail: lsanandres@tamu.edu 18 07 2022 03 08 2022 13 12 2022 dampers rotordynamics force...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. February 2023, 145(2): 024501.
Paper No: GTP-22-1112
Published Online: November 29, 2022
...-mail: patrick.b.lamas@usp.br e-mail: rnicolet@sc.usp.br 04 04 2022 29 08 2022 29 11 2022 rotordynamics vibration structural dynamics modal analysis Fig. 4 Experimental frequency bandwidth of the band gap 1 in comparison to the average modal spacing of the system up to 400 Hz...
Journal Articles
Jefferson Silva Barbosa, Leonardo Campanine Sicchieri, Arinan De Piemonte Dourado, Aldemir Ap Cavalini, Jr., Valder Steffen, Jr.
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2021, 143(6): 061016.
Paper No: GTP-20-1197
Published Online: March 31, 2021
...-mail: leo_sicchieri@ufu.br e-mail: arinandourado@knights.ucf.edu e-mail: aacjunior@ufu.br e-mail: vsteffen@ufu.br 24 04 2020 05 10 2020 31 03 2021 hydrodynamic bearings rotordynamics kriging surrogate models Francis hydropower unit Since the classical lubrication...
Topics:
Bearings
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. November 2020, 142(11): 111004.
Paper No: GTP-20-1430
Published Online: October 20, 2020
... with large forces. A simple kinetics model of the test rig drop produces peak decelerations similar in magnitude to those measured. e-mail: lsanandres@tamu.edu e-mail: bryanrgz@tamu.edu 26 08 2020 19 09 2020 20 10 2020 Gas bearings rotordynamics shock test...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. June 2014, 136(6): 062506.
Paper No: GTP-13-1394
Published Online: February 11, 2014
... of uncertainty in reduced order models of rotordynamics systems. The current effort concentrates on the consistent introduction of uncertainty in mass properties on the modal mass and gyroscopic matrices and on the unbalance force vector. The uncertainty in mass is separated into uncertainty that maintains...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. March 2014, 136(3): 032504.
Paper No: GTP-13-1329
Published Online: November 27, 2013
... by a diaphragm coupling. A total of four radial AFBs support the two rotors, and one set of double acting thrust foil bearing is located inside the gas generator turbine. The rotor configuration results in eight degree of freedom (DOF) rotordynamic motions, which are two cylindrical modes and two conical modes...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2010, 132(11): 112501.
Published Online: August 5, 2010
... in the field of rotordynamics is described in Refs. 13 14 . Additionally, a dedicated research activity ( 7 12 15 16 ) has been devoted to model the effects of the electric circuit dynamics on the damping performance and therefore on the design of eddy current dampers. In a previous paper ( 18...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2010, 132(9): 092502.
Published Online: June 7, 2010
...Raghavendra Murthy; Marc P. Mignolet; Aly El-Shafei In the first part of this series, a comprehensive methodology was proposed for the consideration of uncertainty in rotordynamic systems. This second part focuses on the application of this approach to a simple, yet representative, symmetric rotor...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2010, 132(9): 092501.
Published Online: June 7, 2010
...Raghavendra Murthy; Marc P. Mignolet; Aly El-Shafei A systematic and rational approach is presented for the consideration of uncertainty in rotordynamics systems, i.e., in rotor mass and gyroscopic matrices, stiffness matrix, and bearing coefficients. The approach is based on the nonparametric...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2009, 131(2): 022501.
Published Online: December 19, 2008
... coefficients may be affected by misalignment. bearing rotordynamics foil bearing gas bearing Gas foil bearings (GFBs) are currently used in several commercial applications, both terrestrial and aerospace. Aircraft air cycle machines (ACMs) and ground-based microturbines have demonstrated...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2007, 129(4): 1020–1027.
Published Online: January 2, 2007
... on a small rotor supported on flexure pivot hydrostatic pad gas bearings (FPTPBs) demonstrate stable rotordynamic responses up to 100,000 rpm (limit of the drive motor). Test rotor responses show the feed pressure raises the system critical speed (increase in bearing direct stiffness) while the viscous...