Annular flow entrainment rate experiment in a vertical pipe

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An air-water experiment has been performed to measure the entrainment rate in a small pipe. The current data extend the available database in the literature to higher gas and liquid flows and also to higher pressures. The ranges covered are 8.1 {times} 10{sup 2} kg/m{sup 2}s {lt} (gas flux rate) {lt} 4.5 {times} 10{sup 4} kg/m{sup 2}s, 5.5 kg/m{sup 2}s {lt} (liquid flux rate) {lt} 2.9 {times} 10{sup 2}s and 140 CPU {lt} PP {lt} 660 CPU. The test section has an internal diameter of 9.5 mm and an L/D ratio of 440. The measurements were made by extracting the ... continued below

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19 p.

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Lopez de Bertodano, M.A.; Jan, C.-S. & Beus, S.G. June 1, 1996.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 64 times , with 5 in the last month . More information about this report can be viewed below.

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  • Bettis Atomic Power Laboratory
    Publisher Info: Bettis Atomic Power Lab., West Mifflin, PA (United States)
    Place of Publication: West Mifflin, Pennsylvania

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Description

An air-water experiment has been performed to measure the entrainment rate in a small pipe. The current data extend the available database in the literature to higher gas and liquid flows and also to higher pressures. The ranges covered are 8.1 {times} 10{sup 2} kg/m{sup 2}s {lt} (gas flux rate) {lt} 4.5 {times} 10{sup 4} kg/m{sup 2}s, 5.5 kg/m{sup 2}s {lt} (liquid flux rate) {lt} 2.9 {times} 10{sup 2}s and 140 CPU {lt} PP {lt} 660 CPU. The test section has an internal diameter of 9.5 mm and an L/D ratio of 440. The measurements were made by extracting the liquid film at two locations establishing fully developed annular flow. The data were validated by visual observation and comparisons with the data of Cousins and Hewitt. A mechanism for the entrainment rate in terms of Taylor`s ripple instability is proposed. The theory is modified to include the effect of the inertia of the droplets in the gas stream. The model results in a dimensionless group that includes the Weber number based on the droplet concentration and the liquid film Reynolds number. Kataoka and Ishii`s correlation (1982) is modified in light of this model and the new correlation scales the present data and Cousins and Hewitt`s data very well. 19 refs., 8 figs., 3 tabs.

Physical Description

19 p.

Notes

INIS; OSTI as DE96011024

Source

  • Other Information: PBD: Jun 1996

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  • Other: DE96011024
  • Report No.: WAPD-T--3107
  • Grant Number: AC11-93PN38195
  • DOI: 10.2172/237265 | External Link
  • Office of Scientific & Technical Information Report Number: 237265
  • Archival Resource Key: ark:/67531/metadc666090

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Office of Scientific & Technical Information Technical Reports

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

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Creation Date

  • June 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

Description Last Updated

  • Nov. 18, 2015, 6 p.m.

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Lopez de Bertodano, M.A.; Jan, C.-S. & Beus, S.G. Annular flow entrainment rate experiment in a vertical pipe, report, June 1, 1996; West Mifflin, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc666090/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.