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Keywords: rotordynamic coefficients
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Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT22A024, June 13–17, 2022
Paper No: GT2022-83504
... Abstract Zhang and Childs (2021) investigated the behaviors of a hole-pattern seal (hole depth H d = 1.9 mm) under wet-gas conditions. The hole-pattern seal’s rotordynamic coefficients were strongly frequency-dependent. Direct stiffness K increased as excitation frequency increased...
Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT22A023, June 13–17, 2022
Paper No: GT2022-83499
... hole-pattern seal oil/air mixtures multiphase pump rotordynamic coefficients leakage Abstract Understanding the leakage and rotordynamic performance of a hole-pattern annular seal is critical to the design of a centrifugal pump regarding vibration characteristics and stability...
Topics: Leakage, Pumps
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A021, June 7–11, 2021
Paper No: GT2021-60106
... displacement of the stator to the rotor Keywords: labyrinth seal, tooth clearance, oil-air mixtures, in Y direction [L] multiphase pump, rotordynamic coefficients, leakage µ Viscosity or effective viscosity [FT/L2] density or effective density [M/L3] NOMENCLATURE excitation frequency [1/T] C direct damping...
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT24A022, June 7–11, 2021
Paper No: GT2021-60108
... different flow Subscripts X, and Y directions of the coordinate system conditions. X, Y gas component g liquid component Keywords: smooth seal, multiphase pump, flow regime, l rotordynamic coefficients, leakage Acronyms gas volume fraction NOMENCLATURE GVF C direct damping [FT/L] c cross-coupled damping [FT...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A001, September 21–25, 2020
Paper No: GT2020-14118
... coefficients. Keywords: Smooth Seal, Two-Phase Flow, Mainly Gas, Rotordynamic Coefficients, Leakage. NOMENCLATURE c Cross-coupled damping coefficient [FT/L] C Direct damping coefficient [FT/L] Ceff Effective damping [FT/L] Cij Damping coefficients [FT/L] Cr Seal s radial clearance [L] D Seal s inner diameter...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A007, September 21–25, 2020
Paper No: GT2020-14267
... the machine efficiency. However, reducing C r can also introduce undesired effects on the machine’s vibration behaviors. This paper experimentally studies the impact of reducing C r on the leakage and rotordynamic coefficients of a 16-tooth see-through labyrinth seal under wet-gas conditions. The test...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A008, September 21–25, 2020
Paper No: GT2020-14268
...-liquid to pure-gas conditions. Zhang et al. (2019) conducted a comprehensive experimental study on the performance (leakage and rotordynamic coefficients) of a see-through labyrinth seal under mainly-gas conditions. This paper continues Zhang et al.’s (2019) research and studies the performance...
Proceedings Papers

Proc. ASME. GT2007, Volume 5: Turbo Expo 2007, 843-848, May 14–17, 2007
Paper No: GT2007-27501
... correlation is obtained between the measured test results and analytical predictions. Rotor stability Rotordynamic coefficients Impeller-shroud forces Magnetic-bearing exciter Proceedings of GT2007 ASME Turbo Expo 2007: Power for Land, Sea and Air May 14-17, 2007, Montreal, Canada aerodynamic...
Proceedings Papers

Proc. ASME. GT2006, Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 1211-1223, May 8–11, 2006
Paper No: GT2006-90374
... impellers. The bulk-flow model is used to predict reaction force and moment coefficients for the impeller shroud. A labyrinth seal code developed by Childs and Scharrer [21] is used to calculate the rotordynamic coefficients developed by the labyrinth seals in the compressor stage and also provides...