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Title: Heat Transfer Coefficient Measurement Study of Several Film Boiling Modes in Subcooled He II

Abstract

This study was carried out for more detailed information about film boiling heat transfer in subcooled superfluid helium (He II). A number of film boiling modes were experimentally investigated in a wide range of the pressure from the atmospheric pressure down to the saturated vapor pressure. A thin stainless steel foil heater was used to cause film boiling and as a temperature sensor to measure the heater surface temperature. The results drawn from the heat transfer coefficient measurement give a support to the previous conclusion reached by visualization and pressure measurement studies that two film boiling modes appear in subcooled He II, that is the strongly subcooled film boiling mode and the weakly subcooled film boiling mode. It is, however, found that the dependence of the heat transfer coefficient on pressure was much different from those of conventional fluids. The heat transfer coefficient weakly decrease with the pressure in the weakly subcooled film boiling, and on the other hand it is almost independent of the pressure in the strongly film boiling. The peak of heat transfer coefficient appears at about 8 kPa in the transition region between the weakly subcooled and the noisy film boiling modes.

Authors:
; ;  [1];  [2]
  1. Graduate School of Systems and Information Engineering, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8573 (Japan)
  2. Cryogenics Science Center, Applied Research Laboratory, High energy Accelerator Research Organization, Oho 1-1, Tsukuba 305-0801 (Japan)
Publication Date:
OSTI Identifier:
20800218
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: 10.1063/1.2202441; (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; FILM BOILING; FOILS; HEAT TRANSFER; HELIUM 4; PRESSURE MEASUREMENT; STAINLESS STEELS; SUBCOOLING; SUPERFLUIDITY; VAPOR PRESSURE

Citation Formats

Takada, S., Murakami, M., Nozawa, M., and Kimura, N.. Heat Transfer Coefficient Measurement Study of Several Film Boiling Modes in Subcooled He II. United States: N. p., 2006. Web. doi:10.1063/1.2202441.
Takada, S., Murakami, M., Nozawa, M., & Kimura, N.. Heat Transfer Coefficient Measurement Study of Several Film Boiling Modes in Subcooled He II. United States. doi:10.1063/1.2202441.
Takada, S., Murakami, M., Nozawa, M., and Kimura, N.. Thu . "Heat Transfer Coefficient Measurement Study of Several Film Boiling Modes in Subcooled He II". United States. doi:10.1063/1.2202441.
@article{osti_20800218,
title = {Heat Transfer Coefficient Measurement Study of Several Film Boiling Modes in Subcooled He II},
author = {Takada, S. and Murakami, M. and Nozawa, M. and Kimura, N.},
abstractNote = {This study was carried out for more detailed information about film boiling heat transfer in subcooled superfluid helium (He II). A number of film boiling modes were experimentally investigated in a wide range of the pressure from the atmospheric pressure down to the saturated vapor pressure. A thin stainless steel foil heater was used to cause film boiling and as a temperature sensor to measure the heater surface temperature. The results drawn from the heat transfer coefficient measurement give a support to the previous conclusion reached by visualization and pressure measurement studies that two film boiling modes appear in subcooled He II, that is the strongly subcooled film boiling mode and the weakly subcooled film boiling mode. It is, however, found that the dependence of the heat transfer coefficient on pressure was much different from those of conventional fluids. The heat transfer coefficient weakly decrease with the pressure in the weakly subcooled film boiling, and on the other hand it is almost independent of the pressure in the strongly film boiling. The peak of heat transfer coefficient appears at about 8 kPa in the transition region between the weakly subcooled and the noisy film boiling modes.},
doi = {10.1063/1.2202441},
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}
}