Flow instability in a vertical annulus under steady state and transient conditions

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Experimental data have been obtained for the occurrence of flow instability in a vertical annulus under steady state and transient down-flow conditions. The results show that the primary factor affecting the onset of flow instability is the Q{sub ratio} parameter (a measure of the void production in a channel). In addition, it is shown that for steady state conditions good agreement exists between the single annulus data and single tube data based upon the same L/D ratio. The results also indicate that under transient operation the Q{sub ratio} can be used as a stability criterion.

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Pages: (19 p)

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Fighetti, C.; Kokolis, S.; Maciuca, C.; Reddy, D.G.; Yang, B.; Carrano, V. (Columbia Univ., New York, NY (United States)) et al. January 1, 1992.

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Description

Experimental data have been obtained for the occurrence of flow instability in a vertical annulus under steady state and transient down-flow conditions. The results show that the primary factor affecting the onset of flow instability is the Q{sub ratio} parameter (a measure of the void production in a channel). In addition, it is shown that for steady state conditions good agreement exists between the single annulus data and single tube data based upon the same L/D ratio. The results also indicate that under transient operation the Q{sub ratio} can be used as a stability criterion.

Physical Description

Pages: (19 p)

Notes

OSTI; NTIS; GPO Dep.

Source

  • American Society of Mechanical Engineers national heat transfer conference and exposition, San Diego, CA (United States), 9-12 Aug 1992

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  • Other: DE92013217
  • Report No.: WSRC-MS-92-132
  • Report No.: CONF-920804--7
  • Grant Number: AC09-89SR18035
  • Office of Scientific & Technical Information Report Number: 5211711
  • Archival Resource Key: ark:/67531/metadc1054395

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Creation Date

  • January 1, 1992

Added to The UNT Digital Library

  • Jan. 22, 2018, 7:23 a.m.

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  • Feb. 1, 2018, 7:12 p.m.

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Fighetti, C.; Kokolis, S.; Maciuca, C.; Reddy, D.G.; Yang, B.; Carrano, V. (Columbia Univ., New York, NY (United States)) et al. Flow instability in a vertical annulus under steady state and transient conditions, article, January 1, 1992; Aiken, South Carolina. (digital.library.unt.edu/ark:/67531/metadc1054395/: accessed August 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.