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Proceedings Papers

Investigation of Hydrodynamic Forces on Rotating and Whirling Centrifugal Pump Impellers

R. Fongang, J. Colding-Jørgensen, R. Nordmann

Proc. ASME. GT1996, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T14A003, June 10–13, 1996

Paper No: 96-GT-018

DOI: https://doi.org/10.1115/96-GT-018

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Topics: Centrifugal pumps, Fluid-dynamic forces, Impellers, Whirls, Fluids, Rotors, Vortices, Flow (Dynamics), Pumps

Proceedings Papers

Dynamic Coefficients of Labyrinth Gas Seals: A Comparison of Experimental Results and Numerical Calculations

K. Kwanka, J. Sobotzik, R. Nordmann

Proc. ASME. GT2000, Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education, V004T03A045, May 8–11, 2000

Paper No: 2000-GT-0403

DOI: https://doi.org/10.1115/2000-GT-0403

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Topics: Damping, Dynamics (Mechanics), Finite element analysis, High pressure (Physics), Leakage, Leakage flows, Navier-Stokes equations, Pressure, Rotor vibration, Rotors

Proceedings Papers

Active Bearing of Rotors Utilizing Robust Controlled Piezo Actuators

A. Alizadeh, C. Ehmann, U. Scho¨nhoff, R. Nordmann

Proc. ASME. IDETC-CIE2003, Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C, 2669-2677, September 2–6, 2003

Paper No: DETC2003/VIB-48850

DOI: https://doi.org/10.1115/DETC2003/VIB-48850

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Topics: Bearings, Piezoelectric actuators, Rotors, Design, Actuators, Control equipment, Dimensions, Force feedback, Modeling, Q-factor

Journal Articles

Investigation of Hydrodynamic Forces on Rotating and Whirling Centrifugal Pump Impellers

R. Fongang, J. Colding-Jo̸rgensen, R. Nordmann

J. Turbomach. January 1998, 120(1): 179–185.

DOI: https://doi.org/10.1115/1.2841379

Published Online: January 1, 1998

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Topics: Centrifugal pumps, Fluid-dynamic forces, Impellers, Whirls, Fluids, Rotors, Vortices, Flow (Dynamics), Pumps

Journal Articles

Torsional Vibrations in Turbogenerators Due to Network Disturbances

P. Schwibinger, R. Nordmann

J. Vib. Acoust. July 1990, 112(3): 312–320.

DOI: https://doi.org/10.1115/1.2930510

Published Online: July 1, 1990

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Topics: Turbogenerators, Vibration, Finite element model, Generators, Degrees of freedom, Electronic systems, Finite element methods, Springs, Steam turbines, Stress

Journal Articles

Dynamic Analysis of Centrifugal Pump Rotors With Fluid-Mechanical Interactions

W. Diewald, R. Nordmann

J. Vib. Acoust. October 1989, 111(4): 370–378.

DOI: https://doi.org/10.1115/1.3269871

Published Online: October 1, 1989

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Topics: Centrifugal pumps, Dynamic analysis, Fluid mechanics, Rotors, Fluids, Boilers, Finite element analysis, Impellers, Journal bearings, Pistons

Journal Articles

Sensitivity of the Dynamic Behavior of Structures to System Parameter Changes

R. Nordmann, H. Eckey, P. Kaas, M. Steinwarz

J. Pressure Vessel Technol. August 1989, 111(3): 285–290.

DOI: https://doi.org/10.1115/1.3265676

Published Online: August 1, 1989

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Topics: Algorithms, Dynamic response, Finite element analysis, Modal analysis, Piping systems, Sensitivity analysis, Springs, Stiffness, Structural mechanics, Vessels

Journal Articles

Calculation of Rotordynamic Coefficients and Leakage for Annular Gas Seals by Means of Finite Difference Techniques

R. Nordmann, F. J. Dietzen, H. P. Weiser

J. Tribol. July 1989, 111(3): 545–552.

DOI: https://doi.org/10.1115/1.3261964

Published Online: July 1, 1989

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Topics: Compressible flow, Differential equations, Fluids, Leakage, Leakage flows, Navier-Stokes equations, Pressure, Turbulence

Journal Articles

Improvement of a Reduced Torsional Model by Means of Parameter Identification

P. Schwibinger, R. Nordmann

J. Vib. Acoust. January 1989, 111(1): 17–26.

DOI: https://doi.org/10.1115/1.3269817

Published Online: January 1, 1989

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Topics: Circuits, Degrees of freedom, Excitation, Finite element methods, Finite element model, Generators, Springs, Synchronization, Transients (Dynamics), Turbogenerators

Journal Articles

The Influence of Torsional-Lateral Coupling on the Stability Behavior of Geared Rotor Systems

P. Schwibinger, R. Nordmann

J. Eng. Gas Turbines Power. October 1988, 110(4): 563–571.

DOI: https://doi.org/10.1115/1.3240172

Published Online: October 1, 1988

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Topics: Rotors, Stability, Vibration, Bearings, Clearances (Engineering), Damping, Excitation, Oscillations, Pressure, Pumps

Journal Articles

Discussion: “Analysis of Eccentric Annular Incompressible Seals: Part 1—A New Solution Using Fast Fourier Transforms for Determining Hydrodynamic Force” (Nelson, C. C., and Nguyen, D. T., 1988, ASME J. Tribol., 110, pp. 354–359)

R. Nordmann, F. J. Dietzen

J. Tribol. April 1988, 110(2): 360.

DOI: https://doi.org/10.1115/1.3261632

Published Online: April 1, 1988

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Topics: Fast Fourier transforms, Fluid-dynamic forces

Journal Articles

Calculating Rotordynamic Coefficients of Seals by Finite-Difference Techniques

F. J. Dietzen, R. Nordmann

J. Tribol. July 1987, 109(3): 388–394.

DOI: https://doi.org/10.1115/1.3261453

Published Online: July 1, 1987

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Topics: Finite difference methods, Flow (Dynamics), Modeling, Navier-Stokes equations, Pressure, Turbulence