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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Imprimir: 1065-3090
ISSN On-line: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.2019030835
pages 301-319


Jun Nukaga
Hitachi, Ltd. Research & Development Group 1-1, Ohmika-cho, 7-chome, Hitachi-shi, Ibaraki-ken 319-1292, Japan
Kenichi Yasuda
Hitachi-GE Nuclear Energy, Ltd. Hitachi Works, 1-1, Saiwai-cho, 1-chome, Hitachi-shi, Ibaraki-ken 317-0073, Japan
Toru Aoki
Shizuoka University, Research Institute of Electronics, 3-5-1, Jouhoku, 3-chome, Naka-ku, Hamamatsu-shi, Shizuoka-ken 432-8011, Japan


We have developed a noncontact, nondestructive void fraction measurement system on the basis of three-dimensional X-ray CT with the aim of fully understanding the behavior of high-velocity, high-pressure gas-liquid two-phase flow in piping. To measure the void fraction in the flow at high velocity, the time-averaged CT image acquisition by a multiple averaging method was proposed. It was confirmed that the time-averaged CT image was obtained by the captured image of a sample rotating at a high speed in this system. Furthermore, we measured the void fraction in high-velocity, high-pressure piping and confirmed that the proposed method performed as expected even under actual conditions from a comparison result obtained with a differential pressure gauge.

Palavras-chave: X-ray, time-averaged, CT, two-phase


  1. ASTM International, Standard Guide for Computed Tomography (CT), West Conshohocken, PA: ASTM International, 2019.

  2. Barthel, F., Bieberle, M., Hoppe, D., Banowski, M., and Hampel, U., Velocity Measurement for Two-Phase Flows Based on Ultrafast X-ray Tomography, Flow Meas. Instrum., vol. 46, Part B, pp. 196-203, 2015.

  3. De Vuono, A.C., Schlosser, P., Kulacki, F., and Munshi, P., Design of an Isotopic CT Scanner for Two-Phase Flow Measurements, IEEE Trans. Nucl. Sci., vol. 27, no. 1, pp. 814-820, 1980.

  4. Fischer, F. and Hampel, U., Ultra Fast Electron Beam X-Ray Computed Tomography for Two-Phase Flow Measurement, Nucl. Eng. Design, vol. 240, pp. 2254-2259, 2010.

  5. Fischer, F., Hoppel, D., Schleicher, E., Mattausch, G., Flaske, H., Bartel, R., and Hampel, U., An Ultra Fast Electron Beam X-Ray Tomography Scanner, Meas. Sci. Technol., vol. 19, pp. 1-11, 2008.

  6. Gladden, L.F. and Sederman, A.J., Recent Advances in Flow MRI, J. Magn. Reson., vol. 229, pp. 2-11, 2013.

  7. Johnson, M.W. and Farroll, S., Development of a Turbine Meter for Two-Phase Flow Measurement in Vertical Pipes, Flow Meas. Instrum., vol. 6, no. 4, pp. 279-282, 1995.

  8. Kak, A.C. and Slaney M., Principles of Computerized Tomographic Imaging, Piscataway, NJ: IEEE Press, pp. 113-176, 1988.

  9. Kandlikar, S.G., A General Correlation for Saturated Two-Phase Flow Boiling Heat Transfer Inside Horizontal and Vertical Tubes, J. Heat Transf., vol. 112, pp. 219-228, 1990.

  10. Katono, K., Ishida, N., Sumikawa, T., and Yasuda, K., Air-Water Downscaled Experiments and Three-Dimensional Two-Phase Flow Simulations of Improved Steam Separator for Boiling Water Reactor, Nucl. Eng. Design, vol. 278, no. 15, pp. 465-471, 2014.

  11. Mishima, K. and Hibiki, T., Some Characteristics of Air-Water Two-Phase Flow in Small Diameter Vertical Tubes, Int. J. Multiphase Flow, vol. 22, no. 4, pp. 703-712, 1996.

  12. Mishima, K. and Ishii, M., Flow Regime Transition Criteria for Upward Two-Phase Flow in Vertical Tubes, Int. J. Heat Mass Transf., vol. 27, no. 5, pp. 723-737, 1984.

  13. Nachtrab, F., Firsching, M., Voland, V., Salamon, M., Schropfer, S., Reisinger, S., Worlein, N., Ennen, A., Schmitt, M., Hebele, S., Schlechter, T., and Uhlmann, N., Application Specific Computed Tomography Systems for Core Analysis, Int. Symp. of the Society of Core Analysts, SCA2014-055, 8-11 September, Avignon, France, 2014.

  14. Nagayoshi, T. and Nishida, K., Spacer Effect Model for Subchannel Analysis, J. Nucl. Sci. Technol., vol. 35, no. 6, pp. 399-405, 1998.

  15. Nazemi, E., Feghhi, S., Roshani, G., Gholipour Peyvandi, R., and Setayeshi, S., Precise Void Fraction Measurement in Two-Phase Flows Independent of the Flow Regime Using Gamma-Ray Attenuation, Nucl. Eng. Technol., vol. 48, pp. 64-71, 2016.

  16. Prasser, H.M., Misawa, M., and Tiseanu, I., Comparison between Wire-Mesh Sensor and Ultra-Fast X-Ray Tomograph for an Air-Water Flow in a Vertical Pipe, Flow Meas. Instrum., vol. 16, nos. 2-3, pp. 73-83, 2005.

  17. Serizawa, A., Feng, Z., and Kawara, Z., Two-Phase Flow in Microchannels-Experimental, Therm. Fluid Sci., vol. 26, no. 6, pp. 703-714, 2002.

  18. Shakya, S., Munshi, P., Behling, M., Luke, A., and Mewes, D., Analysis of Dynamic Bias Error in X-Ray Tomographic Reconstructions of a Three-Phase Flow System, Int. J. Multiphase Flow, vol. 58, pp. 57-71, 2014.

  19. Shum, A.D., Parkinson, D., Xiao, X., Weber, A., Burheim, O., and Zenyuk, I., Investigating Phase-Change-Induced Flow in Gas Diffusion Layers in Fuel Cells with X-Ray Computed Tomography, Electrochimica Acta, vol. 256, pp. 279-290, 2017.

  20. Song, K. and Liu, Y., A Compact X-Ray System for Two-Phase Flow Measurement, Meas. Sci. Technol., vol. 9, no. 2, pp. 1-15, 2018.

  21. Triplett, K.A., Ghiaasiaan, S., Abdel-Khalik, S., and Sadowski, D., Gas-Liquid Two-Phase Flow in Microchannels. Part I: Two-Phase Flow Patterns, Int. J. Multiphase Flow, vol. 25, no. 3, pp. 377-394, 1999.