Wall pressure measurements of flooding in vertical countercurrent annular air–water flow

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An experimental study of flooding in countercurrent air-water annular flow in a large diameter vertical tube using wall pressure measurements is described in this paper. Axial pressure profiles along the length of the test section were measured up to and after flooding using fast response pressure transducers for three representative liquid flow rates representing a wide range of liquid Reynolds numbers (ReL = 4Γ/μ; Γ is the liquid mass flow rate per unit perimeter; μ is the dynamic viscosity) from 3341 to 19,048. The results show that flooding in large diameter tubes cannot be initiated near the air outlet and ... continued below

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Choutapalli, I., Vierow, K. January 1, 2010.

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Description

An experimental study of flooding in countercurrent air-water annular flow in a large diameter vertical tube using wall pressure measurements is described in this paper. Axial pressure profiles along the length of the test section were measured up to and after flooding using fast response pressure transducers for three representative liquid flow rates representing a wide range of liquid Reynolds numbers (ReL = 4Γ/μ; Γ is the liquid mass flow rate per unit perimeter; μ is the dynamic viscosity) from 3341 to 19,048. The results show that flooding in large diameter tubes cannot be initiated near the air outlet and is only initiated near the air inlet. Fourier analysis of the wall pressure measurements shows that up to the point of flooding, there is no dominant wave frequency but rather a band of frequencies encompassing both the low frequency and the broad band that are responsible for flooding. The data indicates that flooding in large diameter vertical tubes may be caused by the constructive superposition of a plurality of waves rather than the action of a single large-amplitude wave.

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  • Journal Name: Nuclear Engineering and Design; Journal Volume: not available; Journal Issue: not available; Conference: none.

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  • Report No.: DOE/05ID14696-1
  • Grant Number: FG07-05ID14696
  • DOI: 10.1016/j.nucengdes.2010.06.002 | External Link
  • Office of Scientific & Technical Information Report Number: 983927
  • Archival Resource Key: ark:/67531/metadc1014870

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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Choutapalli, I., Vierow, K. Wall pressure measurements of flooding in vertical countercurrent annular air–water flow, article, January 1, 2010; United States. (digital.library.unt.edu/ark:/67531/metadc1014870/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.