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Proceedings Papers

A Theoretical and Experimental Investigation of a Gas Operated Bearing Damper for Turbomachinery: Part I — Theoretical Model and Predictions

Padmanabhan Sundararajan, John M. Vance
Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 67-83, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0184
https://doi.org/10.1115/DETC1993-0184
View Paper titled, A Theoretical and Experimental Investigation of a Gas Operated Bearing Damper for Turbomachinery: Part I — Theoretical Model and Predictions
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Topics: Bearings, Dampers, Turbomachinery, Damping, Actuators, Design, Flow (Dynamics), Fluids, High temperature, Performance characterization
Proceedings Papers

A New Damper Seal for Turbomachinery

John M. Vance, Richard R. Schultz
Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 139-148, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0188
https://doi.org/10.1115/DETC1993-0188
View Paper titled, A New Damper Seal for Turbomachinery
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Topics: Dampers, Turbomachinery, Design, Damping, Fluids, Vibration, Bearings, Engineering prototypes, Honeycomb structures, Machinery
Proceedings Papers

Effect of Straight Through Labyrinth Seals on Rotordynamics

John M. Vance, J. J. Zierer, Jr., E. M. Conway
Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 159-171, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0190
https://doi.org/10.1115/DETC1993-0190
View Paper titled, Effect of Straight Through Labyrinth Seals on Rotordynamics
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Topics: Blades, Clearances (Engineering), Computers, Damping, Dynamics (Mechanics), Engineering simulation, Flow (Dynamics), Pressure, Rotordynamics, Rotors
Proceedings Papers

A Theoretical and Experimental Investigation of a Gas Operated Bearing Damper for Turbomachinery: Part II — Experimental Results and Comparison With Theory

Padmanabhan Sundararajan, John M. Vance
Proc. ASME. DETC93, 14th Biennial Conference on Mechanical Vibration and Noise: Vibration of Rotating Systems, 85-119, September 19–22, 1993
Publisher: American Society of Mechanical Engineers
Paper No: DETC1993-0185
https://doi.org/10.1115/DETC1993-0185
View Paper titled, A Theoretical and Experimental Investigation of a Gas Operated Bearing Damper for Turbomachinery: Part II — Experimental Results and Comparison With Theory
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Topics: Bearings, Dampers, Turbomachinery, Damping, Design, Actuators, Hardware, High temperature, Vibration dampers
Proceedings Papers

A Gas Operated Bearing Damper for Turbomachinery

John M. Vance, Bradley P. Cardon, Luis A. San Andres, Albert F. Storace
Proc. ASME. GT1991, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V005T14A041, June 3–6, 1991
Publisher: American Society of Mechanical Engineers
Paper No: 91-GT-249
https://doi.org/10.1115/91-GT-249
View Paper titled, A Gas Operated Bearing Damper for Turbomachinery
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Topics: Bearings, Dampers, Turbomachinery, Damping, Design, Displacement, Actuators, Aircraft engines, Ball bearings, Compressors
Proceedings Papers

Test Results of a New Damper Seal for Vibration Reduction in Turbomachinery

John M. Vance, Jiming Li
Proc. ASME. GT1995, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V005T14A001, June 5–8, 1995
Publisher: American Society of Mechanical Engineers
Paper No: 95-GT-036
https://doi.org/10.1115/95-GT-036
View Paper titled, Test Results of a New Damper Seal for Vibration Reduction in Turbomachinery
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Topics: Dampers, Turbomachinery, Vibration, Damping, Leakage, Whirls, Clearances (Engineering), Design, Engineering prototypes, Fluids
Proceedings Papers

Experimental Determination of Rotor Foundation Parameters for Improved Critical Speed Predictions

Jiankang Xu, John M. Vance
Proc. ASME. GT1997, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T14A063, June 2–5, 1997
Publisher: American Society of Mechanical Engineers
Paper No: 97-GT-449
https://doi.org/10.1115/97-GT-449
View Paper titled, Experimental Determination of Rotor Foundation Parameters for Improved Critical Speed Predictions
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Topics: Rotors, Bearings, Mechanical admittance, Computers, Concretes, Damping, Finite element model, Modeling, Steel, Transfer functions
Proceedings Papers

Hybrid Brush Pocket Damper Seals for Turbomachinery

Hector E. Laos, John M. Vance, Steven E. Buchanan
Proc. ASME. GT1999, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V004T03A002, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-016
https://doi.org/10.1115/99-GT-016
View Paper titled, Hybrid Brush Pocket Damper Seals for Turbomachinery
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Topics: Dampers, Turbomachinery, Damping, Leakage, Cavities, Computers, Design, Rotors, Vibration, Aircraft engines
Proceedings Papers

Experimental Measurements of Actively Controlled Bearing Damping With an Electrorheological Fluid

John M. Vance, Daniel Ying
Proc. ASME. GT1999, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V004T03A003, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-017
https://doi.org/10.1115/99-GT-017
View Paper titled, Experimental Measurements of Actively Controlled Bearing Damping With an Electrorheological Fluid
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Topics: Bearings, Damping, Electrorheological fluids, Dampers, Rotors, Vibration, Aircraft engines, Coulombs, Stiffness, Viscosity
Proceedings Papers

Actively Controlled Bearing Dampers for Aircraft Engine Applications

John M. Vance, Daniel Ying, Jorgen L. Nikolajsen
Proc. ASME. GT1999, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V004T03A004, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-018
https://doi.org/10.1115/99-GT-018
View Paper titled, Actively Controlled Bearing Dampers for Aircraft Engine Applications
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Topics: Aircraft engines, Bearings, Dampers, Damping, Coulombs, Vibration, Disks, Engines, Friction, Rotor vibration
Proceedings Papers

Analysis of Actively Controlled Coulomb Damping for Rotating Machinery

John M. Vance, Luis A. San Andrés
Proc. ASME. GT1999, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V004T03A014, June 7–10, 1999
Publisher: American Society of Mechanical Engineers
Paper No: 99-GT-175
https://doi.org/10.1115/99-GT-175
View Paper titled, Analysis of Actively Controlled Coulomb Damping for Rotating Machinery
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Topics: Coulombs, Damping, Machinery, Dampers, Bearings, Friction, Rotors, Aircraft engines, Disks, Dry friction
Proceedings Papers

Experimental Evaluation of a Metal Mesh Bearing Damper in Parallel With a Structural Support

Eyad M. Al-Khateeb, John M. Vance
Proc. ASME. GT2001, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T03A014, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0247
https://doi.org/10.1115/2001-GT-0247
View Paper titled, Experimental Evaluation of a Metal Mesh Bearing Damper in Parallel With a Structural Support
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Topics: Bearings, Dampers, Metals, Damping, Copper, Rotors, Density, Stainless steel, Stiffness, Vibration
Proceedings Papers

Experimental Evaluation of Hybrid Damper Seals With Brush Elements: Effect of the Bristles on Power Dissipation and Rotordynamics

Steven E. Buchanan, John M. Vance
Proc. ASME. GT2001, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award, V004T03A015, June 4–7, 2001
Publisher: American Society of Mechanical Engineers
Paper No: 2001-GT-0248
https://doi.org/10.1115/2001-GT-0248
View Paper titled, Experimental Evaluation of Hybrid Damper Seals With Brush Elements: Effect of the Bristles on Power Dissipation and Rotordynamics
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Topics: Dampers, Damping, Dimensions, Energy dissipation, Friction, High pressure (Physics), Leakage, Rotordynamics, Torque, Whirls
Proceedings Papers

Shrink Fit Effects on Rotordynamic Stability: Theoretical Study

Syed Muhammad Mohsin Jafri, John M. Vance
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 1017-1024, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50412
https://doi.org/10.1115/GT2008-50412
View Paper titled, Shrink Fit Effects on Rotordynamic Stability: Theoretical Study
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Topics: Computer software, Damping, Disks, Eigenvalues, Engineering simulation, Finite element analysis, Friction, Internal friction, Machinery, Newton's laws of motion
Proceedings Papers

Diagnosing Coupled Lateral-Torsional Vibrations in Turbomachinery

Vinayaka N. Rajagopalan, John M. Vance
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 923-930, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50125
https://doi.org/10.1115/GT2008-50125
View Paper titled, Diagnosing Coupled Lateral-Torsional Vibrations in Turbomachinery
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Topics: Turbomachinery, Vibration, Signals, Damage, Engines, Gears, Machinery, Motors, Spin (Aerodynamics), Spinning (Textile)
Proceedings Papers

Shrink Fit Effects on Rotordynamic Stability: Experimental Study

Syed Muhammad Mohsin Jafri, John M. Vance
Proc. ASME. GT2008, Volume 5: Structures and Dynamics, Parts A and B, 995-1006, June 9–13, 2008
Publisher: American Society of Mechanical Engineers
Paper No: GT2008-50410
https://doi.org/10.1115/GT2008-50410
View Paper titled, Shrink Fit Effects on Rotordynamic Stability: Experimental Study
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Topics: Aluminum, Bearings, Disks, Internal friction, Machinery, Press fits, Rotor vibration, Rotors, Stability, Vibration
Proceedings Papers

Diagnosing Subsynchronous Vibrations: Unstable or Benign

Vinayaka N. Rajagopalan, John M. Vance
Proc. ASME. IDETC-CIE2007, Volume 1: 21st Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C, 1763-1773, September 4–7, 2007
Publisher: American Society of Mechanical Engineers
Paper No: DETC2007-35694
https://doi.org/10.1115/DETC2007-35694
View Paper titled, Diagnosing Subsynchronous Vibrations: Unstable or Benign
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Topics: Vibration, Rotors, Computer simulation, Bearings, Damage, Dry friction, Signals, Turbomachinery, Clearances (Engineering), Compressors
Proceedings Papers

Labyrinth Seal Leakage Tests: Tooth Profile, Tooth Thickness, and Eccentricity Effects

Ahmed M. Gamal, John M. Vance
Proc. ASME. GT2007, Volume 4: Turbo Expo 2007, Parts A and B, 1127-1138, May 14–17, 2007
Publisher: American Society of Mechanical Engineers
Paper No: GT2007-27223
https://doi.org/10.1115/GT2007-27223
View Paper titled, Labyrinth Seal Leakage Tests: Tooth Profile, Tooth Thickness, and Eccentricity Effects
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Topics: Leakage, Blades, Hardware, Cavities, Design, Flow (Dynamics), Fluids, Pressure measurement, Testing
Proceedings Papers

Design Equations for Wire Mesh Bearing Dampers in Turbomachinery

Vivek V. Choudhry, John M. Vance
Proc. ASME. GT2005, Volume 4: Turbo Expo 2005, 807-814, June 6–9, 2005
Publisher: American Society of Mechanical Engineers
Paper No: GT2005-68641
https://doi.org/10.1115/GT2005-68641
View Paper titled, Design Equations for Wire Mesh Bearing Dampers in Turbomachinery
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Topics: Bearings, Dampers, Design, Turbomachinery, Vibration, Wire mesh
Proceedings Papers

High-Pressure Pocket Damper Seals: Leakage Rates and Cavity Pressures

Ahmed M. Gamal, Bugra H. Ertas, John M. Vance
Proc. ASME. GT2006, Volume 5: Marine; Microturbines and Small Turbomachinery; Oil and Gas Applications; Structures and Dynamics, Parts A and B, 1303-1312, May 8–11, 2006
Publisher: American Society of Mechanical Engineers
Paper No: GT2006-90858
https://doi.org/10.1115/GT2006-90858
View Paper titled, High-Pressure Pocket Damper Seals: Leakage Rates and Cavity Pressures
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Topics: Cavities, Dampers, High pressure (Physics), Leakage, Turbomachinery