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TECHNICAL PAPERS: Gas Turbines: Structures and Dynamics

Reliable Rotor Dynamic Design of High-Pressure Compressors Based on Test Rig Data

[+] Author and Article Information
N. G. Wagner

Development Mechanics, DEMAG DELAVAL Turbomachinery, Duisburg D-47015, Germany

J. Eng. Gas Turbines Power 123(4), 849-856 (Aug 01, 2000) (8 pages) doi:10.1115/1.1373396 History: Received March 01, 1999; Revised August 01, 2000
Copyright © 2001 by ASME
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References

Gelin, A., Pugnet, J.-M. Bolusset, D., and Friez, P., 1996, “Experience in Full-Load Testing Natural Gas Centrifugal Compressors for Rotordynamic Improvements,” ASME Paper 96-GT-378.
Memmott, E. A., 1992, “Stability of Centrifugal Compressors by Applications of Tilt Pad Seals, Damper Bearings, and Shunt Holes,” C432/070 IMechE.
Sorokes, J. M., Kuzdzal, M. J., Sandberg, M. R., and Colby, G. M., 1994, “Recent Experiences in Full Load Full Pressure Shop Testing of a High Pressure Gas Injection Centrifugal Compressor,” Proc. of the 23rd Turbomachinery Symposium, Texas A&M University, College Station, TX.
Zeidan, F. Y., Perez, R. X., and Stephenson, E. M., 1993, “The Use of Honeycomb Seals in Stabilizing Two Centrifugal Compressors,” Proc. of the 22nd Turbomachinery Symposium, Texas A&M University, College Station, TX.
Athavale, M. M., Przekwas, A. J., and Hendricks, R. C., 1993 “A 3D-CFD Code for Accurate Prediction of Fluid Flows and Fluid Forces in Seals, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3239, pp. 137–148.
Weiser, P., and Nordmann, R., 1990, “Determination of Rotordynamic Coefficients for Labyrinth Seals and Application to Rotordynamic Design Calculations, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3122, pp. 203–222.
Millsaps, K. T., and Martinez-Sanchez, M., 1993, “Rotordynamic Forces in Labyrinth Seals: Theory and Experiment, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3239, pp. 179–208.
Scharrer, J. K., 1987, A “Comparison of Experimental and Theoretical Results for Labyrinth Gas Seals,” doctoral dissertation, Texas A&M University.
Childs, D. W., and Ramsey, C., 1990, “Seal-Rotordynamic-Coefficient Test Results for a Model SSME ATD-HPFTP Turbine Interstage Seal With and Without a Swirl Brake, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3122,, pp. 179–190.
Benckert, H., 1980, “Strömungsbedingte Federkennwerte in Labyrinthdichtungen,” doctoral dissertation, University of Stuttgart, Stuttgart, Germany.
Childs, D. W., and Scharrer, J. K., 1986, “Experimental Rotordynamic Coefficient Results for Teeth-on-Rotor and Teeth-on-Stator Labyrinth Gas Seals,” ASME Paper 86-GT-12.
Childs, D. W., 1993, Turbomachinery Rotordynamics, Phenomena, Modeling and Analysis, John Wiley and Sons.
Wagner, N. G., Steff, K., 1996, “Dynamic Labyrinth Coefficients From a High-Pressure Full-Scale Test Rig Using Magnetic Bearings, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3344, pp. 95–112.
Wagner, N. G., and Pietruszka, W. D., 1998, “Identification of Rotor-Dynamic Parameters on a Test Stand With Active Magnetic Bearings,” Proceedings of the First International Symposium on Magnetic Bearings, Zurich, Springer-Verlag, New York, pp. 289–299.
Wagner, N. G., and Steff, K., 1997, “Bestimmung der dynamischen Labyrinthkoeffizienten unter realistischen Betriebsbedingungen mit Hilfe aktiver Magnetlager, Schwingungen in rotierenden Maschinen,” Proceedings of Conference SIRM’97, Irretier, Nordmann, Springer, Vieweg-Verlag Brauns-chweig/Wiesbaden, Germany.
Childs, D. W., Elrod, D., Hale, K., 1988, “Annular Honeycomb Seals: Test Results for Leakage and Rotordynamic Coefficients: Comparisons to Labyrinth and Smooth Configurations, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3026, pp. 143–159.
Childs, D. W., Baskharone, E., and Ramsey, C., 1990, “Test Results for Rotordynamic Coefficients of the SSME HPOTP Turbine Interstage Seal With Two Swirl Brakes, Rotordynamic Instability Problems in High-Performance Turbomachinery,” NASA Conf. Publ. 3122, pp. 165–178.
Wagner, N. G., de Jongh, F. M., and Moffatt, R., 2000, “Design Testing and Field Experience of a High-Pressure Natural Gas Reinjection Compressor,” Proc. of the 29th Turbomachinery Symposium, Texas A&M University, College Station, TX.

Figures

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Sectional view of the test stand
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Measured overall transfer function of a honeycomb seal
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Effect of curved swirl brake on stiffness angle
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Stiffness and damping vector with and without swirl brake
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Total stiffness and total damping for different types of seals
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Effect of increasing gas density from 0 percent to 200 percent on eigenvalues
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Effect of labyrinth gap width on rotor stability
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Effect of side loads on rotor stability
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Photograph of the reinjection compressor
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Cascade plots for test run with and without swirl brakes

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