Sparger Effects on Gas Volume Fraction Distributions in Vertical Bubble-Column Flows as Measured by Gamma-Densitometry Tomography

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Gamma-densitometry tomography is applied to study the effect of sparger hole geometry, gas flow rate, column pressure, and phase properties on gas volume fraction profiles in bubble columns. Tests are conducted in a column 0.48 m in diameter, using air and mineral oil, superficial gas velocities ranging from 5 to 30 cm s{sup -1}, and absolute column pressures from 103 to 517 kPa. Reconstructed gas volume fraction profiles from two sparger geometries are presented. The development length of the gas volume fraction profile is found to increase with gas flow rate and column pressure. Increases in gas flow rate increase ... continued below

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8 p.

Creation Information

GEORGE,DARIN L.; SHOLLENBERGER,KIM ANN & TORCZYNSKI,JOHN R. January 18, 2000.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Gamma-densitometry tomography is applied to study the effect of sparger hole geometry, gas flow rate, column pressure, and phase properties on gas volume fraction profiles in bubble columns. Tests are conducted in a column 0.48 m in diameter, using air and mineral oil, superficial gas velocities ranging from 5 to 30 cm s{sup -1}, and absolute column pressures from 103 to 517 kPa. Reconstructed gas volume fraction profiles from two sparger geometries are presented. The development length of the gas volume fraction profile is found to increase with gas flow rate and column pressure. Increases in gas flow rate increase the local gas volume fraction preferentially on the column axis, whereas increases in column pressure produce a uniform rise in gas volume fraction across the column. A comparison of results from the two spargers indicates a significant change in development length with the number and size of sparger holes.

Physical Description

8 p.

Notes

OSTI as DE00750326

Medium: P; Size: 8 pages

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  • 2000 ASME Fluids Engineering Division Summer Conference, Boston, MA (US), 06/11/2000--06/15/2000

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  • Report No.: SAND2000-0161C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 750326
  • Archival Resource Key: ark:/67531/metadc706570

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 18, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 7:06 p.m.

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GEORGE,DARIN L.; SHOLLENBERGER,KIM ANN & TORCZYNSKI,JOHN R. Sparger Effects on Gas Volume Fraction Distributions in Vertical Bubble-Column Flows as Measured by Gamma-Densitometry Tomography, article, January 18, 2000; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc706570/: accessed April 27, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.