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Development of universal databases and predictive tools for two-phase heat transfer and pressure drop in cryogenic flow boiling heated tube experiments.

Author(s) : GANESAN V.

Type of monograph: Doctoral thesis

Summary

Experiments to determine saturated flow boiling heat transfer coefficient (HTC), critical heat flux (CHF), film boiling HTC, and total pressure drop (ΔPT) for cryogens in uniformly heated, round tubes have been performed throughout the globe during the past sixty years. However, experimental cryogenic flow boiling data are either rarely published or made available only for a few cryogens, with majority remaining in the archives of authors, or in obscure technical reports of an organization or other inaccessible sources.

In the present study, the Purdue University-Boiling and Two-Phase Flow Laboratory (PU-BTPFL) Cryogenic Flow Boiling Databases for saturated flow boiling HTC (2505 local and 747 average data points), CHF (2312 Departure from Nucleate Boiling and Dryout data points), Post-CHF flow film boiling HTC (1730 local Dispersed Flow Film Boiling and 1310 local Inverted Annular Film Boiling data points), and Total Pressure Drop (208 saturated adiabatic liquid-vapor two-phase flow and 266 saturated flow boiling data points) are consolidated from world literature dating back to 1959 for Liquid Helium (LHe I), Liquid Hydrogen (para-LH2), Liquid Neon (LNe), Liquid Nitrogen (LN2), Liquid Argon (LAr), and Liquid Methane (LCH4). These individually and combined represents the largest cryogen flow boiling database assembled to date. These consolidated databases represent an invaluable tool for development of cryogenic flow boiling heat transfer and pressure drop correlations – a primary goal for the present study – as well as future analytic and computational models.

Using this database, distinct physics unique to cryogens are studied and new dimensionless criteria are developed to classify the data, which are subsequently used to both assess predictive accuracy of seminal HTC, CHF, and two-phase frictional pressure gradient correlations and develop new:
• Universal cryogenic saturated flow boiling HTC correlations.
• Universal cryogenic CHF correlations for two distinct CHF mechanisms, viz., Departure from Nucleate Boiling (DNB) and Dryout.
• Universal Post-CHF cryogenic flow boiling HTC correlations for Dispersed Flow Film Boiling (DFFB) and Inverted Annular Film Boiling (IAFB)
• Minimum Heat Flux (MHF) and local Re-wet Temperature (RT) correlations for cryogenic flow boiling.
• Universal cryogenic saturated two-phase flow frictional pressure gradient correlations for both dispersed and separated flows.

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Pages: 301 p.

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Details

  • Original title: Development of universal databases and predictive tools for two-phase heat transfer and pressure drop in cryogenic flow boiling heated tube experiments.
  • Record ID : 30032450
  • Languages: English
  • Subject: Technology
  • Publication: Purdue University
  • Publication date: 2023/08
  • DOI: http://dx.doi.org/https://doi.org/10.25394/PGS.23773413.v1

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