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TECHNICAL PAPERS

Vibration Behavior of Rotated Triangular Tube Bundles in Two-Phase Cross Flows

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

Atomic Energy of Canada Ltd., Chalk River Laboratories, Chalk River, ON Canada K0J 1J0

J. Pressure Vessel Technol 124(2), 144-153 (May 01, 2002) (10 pages) doi:10.1115/1.1462045 History: Received June 18, 2001; Revised November 02, 2001; Online May 01, 2002
Copyright © 2002 by ASME
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References

Figures

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Hydrodynamic mass in two-phase flow
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Hydrodynamic mass in Freon and air-water two-phase flow
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Total damping ratio in two-phase flow, for the tests in Freon-134a
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Two-phase damping component in air-water, Freon and steam-water two-phase flow
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Fluidelastic instability diagram in two-phase flow. Changes in flow regime occur at void fractions above approximately 80% in air-water, 65% in Freon-22, and 85% in Freon-134a.
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Grant flow-regime map for two-phase cross flows. Each of the three series is labeled with the void fraction value above which the flow becomes intermittent.
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Fluidelastic instability diagram for continuous flow regime
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Power spectral density of random turbulence excitation forces per unit length, at reduced frequency fdB/Up=0.1.: comparison Freon-22 versus air-water
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Power spectral density of random turbulence excitation force per unit length, at reduced frequency fdB/Up=0.1
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McQuillan and Whalley flow-regime map showing test conditions
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Diagram of the Freon loop test section
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End view of the 465-mm tube array. Cross-hatched tubes were instrumented with strain gages.
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Typical vibration response spectra for interior tube LD-7, at 80% void fraction
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Typical RMS vibration response in two-phase flow, as a function of pitch velocity (interior tube LD-7)
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Typical RMS vibration response in liquid flow (interior tube LD-7)

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