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ADDITIONAL TECHNICAL PAPERS

Thermal Damping in Cavitating Nozzle Flows

[+] Author and Article Information
Can F. Delale

Department of Aeronautics and Astronautics, Istanbul Technical University, 80626 Maslak, Istanbul and Tübı́tak Feza Gürsey Institute, P.O. Box 6, 81220 Cengelköy, Istanbul, Turkeye-mail: delale@gursey.gov.tr

J. Fluids Eng 124(4), 969-976 (Dec 04, 2002) (8 pages) doi:10.1115/1.1511163 History: Received July 27, 2001; Received May 29, 2002; Online December 04, 2002
Copyright © 2002 by ASME
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References

Figures

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Investigated nozzle geometry
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Distributions of the pressure coefficient Cp without (κ=0.0) and with thermal damping (κ=0.05 and κ=0.5) along the nozzle axis with initial void fraction β0=10−5, initial cavitation number σ0=0.5, inlet flow speed u0=10 m/s, and initial radius R0=10 μm (corresponding to D=61,841) for the steady-state solution of water vapor-air bubbles in water at 20°C (note that no difference can be seen between the pressure coefficients in the scale used in the figure)
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Distributions of the normalized radius R without (κ=0.0) and with thermal damping (κ=0.05 and κ=0.5) along the nozzle axis under conditions specified in Fig. 2
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Distributions of the pressure coefficient Cp without (κ=0.0) and with thermal damping (κ=0.07 and κ=0.7) along the nozzle axis with initial void fraction β0=10−5, initial cavitation number σ0=0.5, inlet flow speed u0=10 m/s, and initial radius R0=20 μm (corresponding to D=13,289) for the steady-state solution of water vapor-air bubbles in water at 20°C
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Distributions of the normalized radius R without (κ=0.0) and with thermal damping (κ=0.07 and κ=0.7) along the nozzle axis under conditions specified in Fig. 4
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Distributions of the pressure coefficient Cp without (κ=0.0) and with thermal damping (κ=0.32 and κ=0.5), corresponding to bubbly shock solutions, along the nozzle axis with initial void fraction β0=10−5, initial cavitation number σ0=0.5, inlet flow speed u0=10 m/s and initial radius R0=33 μm (corresponding to D=4458) for the steady-state solution of water vapor-air bubbles in water at 20°C
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Distributions of the normalized radius R without (κ=0.0) and with thermal damping (κ=0.32 and κ=0.5), corresponding to bubbly shock solutions, along the nozzle axis under conditions specified in Fig. 6
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Stability diagram of the parameter κ versus the initial radius R0 under nozzle inlet conditions with initial void fraction β0=10−5, initial cavitation number σ0=0.5 and inlet flow speed u0=10 m/s for the steady-state solution of water vapor-air bubbles in water at 200C

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