... 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...

..., 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...

... 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...

...-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...

...-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...

... 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...

... 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...

... 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...

... 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...

...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...

...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...

... 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...

... 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...