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Title: Forced Convection Heat Transfer of He I and He II at Pressures up to Supercritical

Abstract

The forced convection heat transfer coefficients were measured on a horizontal flat plate heater located on inner wall of a rectangular duct for pressures from 1 atm to 2.8 atm, flow velocities up to 2.1 m/s and for liquid temperatures from 1.8 to 6.5 K. Critical heat fluxes (CHFs) in He II under subcritical and supercritical pressures are higher for higher flow velocity and lower liquid temperature. In He I under supercritical pressures, there are two distinct ranges in heat transfer curves. The curve for lower heat flux range has a steeper gradient and the curve for higher heat flux has a lower gradient like film boiling regime. The peak heat fluxes of the former curves are treated as pseudo CHFs in this study and compared with the CHFs for He II.

Authors:
;  [1];  [2]; ;  [3]
  1. Dept. of Energy Science and Technology, Kyoto Univ., Uji, Kyoto 611-0011 (Japan)
  2. Institute of Particle and Nuclear Studies, KEK, Oho, Tsukuba, Ibaraki 305-0801 (Japan)
  3. Institute of Advanced Energy, Kyoto Univ., Uji, Kyoto 611-0011 (Japan)
Publication Date:
OSTI Identifier:
20800223
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 823; Journal Issue: 1; Conference: Cryogenic engineering conference, Keystone, CO (United States), 29 Aug - 2 Sep 2005; Other Information: DOI: 10.1063/1.2202448; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ATMOSPHERIC PRESSURE; CRITICAL HEAT FLUX; DUCTS; FILM BOILING; FORCED CONVECTION; HEATERS; HELIUM I; HELIUM II; LIQUIDS; SUPERFLUIDITY; VELOCITY

Citation Formats

Shiotsu, M., Shirai, Y., Okamura, T., Hata, K., and Hama, K. Forced Convection Heat Transfer of He I and He II at Pressures up to Supercritical. United States: N. p., 2006. Web. doi:10.1063/1.2202448.
Shiotsu, M., Shirai, Y., Okamura, T., Hata, K., & Hama, K. Forced Convection Heat Transfer of He I and He II at Pressures up to Supercritical. United States. doi:10.1063/1.2202448.
Shiotsu, M., Shirai, Y., Okamura, T., Hata, K., and Hama, K. Thu . "Forced Convection Heat Transfer of He I and He II at Pressures up to Supercritical". United States. doi:10.1063/1.2202448.
@article{osti_20800223,
title = {Forced Convection Heat Transfer of He I and He II at Pressures up to Supercritical},
author = {Shiotsu, M. and Shirai, Y. and Okamura, T. and Hata, K. and Hama, K.},
abstractNote = {The forced convection heat transfer coefficients were measured on a horizontal flat plate heater located on inner wall of a rectangular duct for pressures from 1 atm to 2.8 atm, flow velocities up to 2.1 m/s and for liquid temperatures from 1.8 to 6.5 K. Critical heat fluxes (CHFs) in He II under subcritical and supercritical pressures are higher for higher flow velocity and lower liquid temperature. In He I under supercritical pressures, there are two distinct ranges in heat transfer curves. The curve for lower heat flux range has a steeper gradient and the curve for higher heat flux has a lower gradient like film boiling regime. The peak heat fluxes of the former curves are treated as pseudo CHFs in this study and compared with the CHFs for He II.},
doi = {10.1063/1.2202448},
journal = {AIP Conference Proceedings},
number = 1,
volume = 823,
place = {United States},
year = {Thu Apr 27 00:00:00 EDT 2006},
month = {Thu Apr 27 00:00:00 EDT 2006}
}