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TECHNICAL PAPERS

High Pressure Annular Two-Phase Flow in a Narrow Duct: Part I—Local Measurements in the Droplet Field

[+] Author and Article Information
Thomas A. Trabold

Xerox Corporation, Rochester, NY 14580

Ranganathan Kumar

Lockheed Martin Corporation, Schenectady, NY 12301

J. Fluids Eng 122(2), 364-374 (Jan 25, 2000) (11 pages) doi:10.1115/1.483266 History: Received December 04, 1998; Revised January 25, 2000
Copyright © 2000 by ASME
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References

Hewitt, G. F., and Hall-Taylor, N. S., 1970, Annular Two-Phase Flow, Pergamon Press.
Kumar,  R., and Trabold,  T. A., 2000, “High Pressure Annular Two-Phase Flow in a Narrow Duct: Part II—Three Field Modeling,” ASME J. Fluids Eng., 122, pp. 375–384.
Trabold,  T. A., Kumar,  R., and Vassallo,  P. F., 1999, “Experimental Study of Dispersed Droplets in High Pressure Annular Flows,” ASME J. Heat Transfer, 121, pp. 924–933.
Trabold, T. A., Moore, W. E., Morris, W. O., Symolon, P. D., Vassallo, P. F., and Kirouac, G. J., 1994, “Two Phase Flow of Freon in a Vertical Rectangular Duct. Part II: Local Void Fraction and Bubble Size Measurements,” Experimental and Computational Aspects of Validation of Multiphase Flow CFD Codes, I. Celik et al., (ed.), ASME, FED-Vol. 180, pp. 67–76.
Trabold, T. A., Moore, W. E., and Morris, W. O., 1997, “Hot-Film Anemometer Measurements in Adiabatic Two-Phase Refrigerant Flow through a Vertical Duct,” ASME Fluids Engineering Division Summer Meeting, Vancouver, B.C., Paper FEDSM97-3518.
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Hall-Taylor,  N. S., Hewitt,  G. F., and Lacey,  P. M. C., 1963, “The Motion and Frequency of Large Disturbance Waves in Annular Two-Phase Flow of Air-Water Mixtures,” Chem. Eng. Sci., 18, pp. 537–552.
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Figures

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Front view of the R-134a test section and measurement locations
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Local Z-dimension void fraction distributions for w=106 kg/hr and P=2.4 MPa
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Local HFA Z-dimension void fraction profiles for w=532 kg/hr (a) P P=1.4 MPa; (b) P=2.4 MPa. Dashed line is the cross-section average void fraction using the gamma densitometer.
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Photographs of waves in annular flow
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Local Y-dimension velocity profiles for w=532 kg/hr (a) P=1.4 MPa; (b) P=2.4 MPa. Dashed line is the mixture velocity
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Local Z-dimension parameter distributions for w=532 kg/hr and P=1.4 MPa; (a) void fraction; (b) velocity; (c) frequency; (d) droplet diameter; (e) interfacial area concentration.
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Local Z-dimension parameter distributions for α=0.94 and P=2.4 MPa; (a) void fraction; (b) velocity; (c) frequency; (d) droplet diameter; (e) interfacial area concentration.
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Comparison of droplet diameter data to relation of Ueda 19
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Comparison of droplet diameter data to relation of Kocamustafaogullari et al. 21
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Relationship between average void fraction and interfacial area concentration for P=1.4 and 2.4 MPa

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