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Article

Fluidelastic Instability and Work-Rate Measurements of Steam-Generator U-Tubes in Air–Water Cross-Flow

[+] Author and Article Information
V. P. Janzen, E. G. Hagberg, M. J. Pettigrew, C. E. Taylor

Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, Ontario, K0J 1J0, Canada

J. Pressure Vessel Technol 127(1), 84-91 (Mar 15, 2005) (8 pages) doi:10.1115/1.1849229 History: Received August 20, 2002; Revised July 08, 2004; Online March 15, 2005
Copyright © 2005 by ASME
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References

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Pettigrew,  M. J., Taylor,  C. E., Fisher,  N. J., Yetisir,  M., and Smith,  B. A. W., 1998, “Flow-Induced Vibration: Recent Findings and Open Questions,” Nucl. Eng. Des., 185, pp. 249–276.
Au-Yang, M. K., Flow-Induced Vibration of Power and Process Plant Components, ASME Press, New York, 2001.
Green,  S. J., and Hetsroni,  G., 1995, “PWR Steam Generators,” Int. J. Multiphase Flow, 21, pp. 1–97.
Pettigrew,  M. J., Kim,  B. S., Taylor,  C. E., and Tromp,  J. H., 1989, “Vibration of Tube Bundles in Two-Phase Cross-Flow—Part 2: Fluidelastic Instability,” ASME J. Pressure Vessel Technol., 111, pp. 478–487.
Pettigrew,  M. J., Taylor,  C. E., Jong,  J. H., and Currie,  I. G., 1995, “Vibration of a Tube Bundle in Two-Phase Freon Cross Flow,” ASME J. Pressure Vessel Technol., 117, pp. 321–329.
Taylor, C. E., and Pettigrew, M. J., 2000, “Effect of Flow Regime and Void Fraction on Tube Bundle Vibration,” Flow-Induced Vibration, S. Ziada and T. Staubli, eds., A. A. Balkema, Rotterdam, pp. 529–536.
Pettigrew,  M. J., Taylor,  C. E., Janzen,  V. P., and Whan,  T., 2002, “Vibration Behavior of Rotated Triangular Tube Bundles in Two-Phase Cross Flows,” ASME J. Pressure Vessel Technol., 2, pp. 144–153.
Taylor, C. E., Pettigrew, M. J., and Tromp, J. H., 1991, “Vibration of SG U-Bend Tubes: Effectiveness of Flat-Bar Restraints,” ASME PVP-Vol. 206, Flow-Induced Vibration, pp. 1–8.
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Frick, T. M., Sobek, T. E., and Reavis, R. J., 1984, “Overview on the Development and Implementation of Methodologies to Compute Vibration and Wear of Steam Generator Tubes,” Proceedings Symposium on Flow-Induced Vibration, M. P. Païdoussis, ed., ASME Press, New York, pp. 139–148.
Guérout, F. M., and Fisher, N. J., 1999, “Steam Generator Fretting-Wear Damage: A Summary of Recent Findings,” ASME PVP-Vol. 389, Flow-Induced Vibration, pp. 227–234.
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Figures

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Diagram of the U-bend test section
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Tube bundle and instrumentation layout
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Lowest vibration modes for an unsupported U-tube (after Boucher and Taylor 11)
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Out-of-plane U-tube frequency-response spectrum for 90% void fraction, at a pitch velocity of 8.7 m/s, with a 1.5-mm tube-to-support clearance. Peaks corresponding to the lowest vibration modes are labeled (/Sup≡tube supported at apex).
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Out-of-plane vibration response spectra as a function of mass flux for liquid flow and a 0.75-mm tube-to-support clearance. Note the mode switch at ∼1750 kg/m2  s mass flux (Vp∼1.7 m/s).
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The rms vibration amplitudes for the lowest out-of-plane and in-plane (tangential) vibration modes
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Out-of-plane vibration amplitudes measured by strain gauges, in liquid flow
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In-plane tangential vibration amplitudes in liquid flow, measured by strain gauges
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In-plane-tangential vibration frequency-response spectra in liquid flow at pitch velocities of 1.08 m/s and 1.30 m/s
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Measured contact time of tube-to-support impacts for zero to 90% void fraction, with 0.75-mm tube-to-support clearance
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Measured total in-plane sliding distance during tube-to-support impacts for zero to 90% void fraction, with 0.75-mm tube-to-support clearance
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Measured force of tube-to-support impacts for zero to 90% void fraction, with 0.75-mm tube-to-support clearance
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Measured total work-rate during tube-to-support impacts for zero to 90% void fraction, with 0.75-mm tube-to-support clearance
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Measured total work-rate during tube-to-support impacts for zero to 90% void fraction, with 1.5-mm tube-to-support clearance

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