TITLE

Critical Heat Flux on a Flat Plate Located at the Middle of a Duct in Forced Flow of Pressurized He II

AUTHOR(S)
Okamura, T.; Saeki, M.; Hata, K.; Kama, K.; Shirai, Y.; Shiotsu, M.
PUB. DATE
June 2004
SOURCE
AIP Conference Proceedings;2004, Vol. 710 Issue 1, p1023
SOURCE TYPE
Conference Proceeding
DOC. TYPE
Article
ABSTRACT
Critical heat fluxes (CHFs) were measured on two horizontal flat plate heaters 6 mm wide and 20 mm long located on inner upper and lower walls of a rectangular duct at 50 mm from the inlet. The duct has 3 mm × 20 mm inner cross sectional area and 100 mm length. The flat plate heaters are made of Manganin and connected electrically in series. Therefore, the ratio of the cross-sectional area of duct to the heater area is 0.25. The measurements were made for the flow velocities from 0 m/s to 2.1 m/s and for the inlet liquid temperatures of 1.6 K, 1.8 K, 1.9 K, 2.0 K and 2.1 K. The measured CHFs were higher for larger flow velocity and lower liquid temperature. The equation of CHF for the forced convection was derived based on two fluid model, ordinary convection theorem and experimental results. It was confirmed that this correlation can describe not only the author’s data on the duct but also other worker’s data for channels with different shapes and sizes. © 2004 American Institute of Physics
ACCESSION #
13868963

 

Related Articles

  • Heat Transport Characteristics of He II Channels with the Fountain Effect. Suemasu, K.; Takahashi, M.; Okamura, T. // AIP Conference Proceedings;2004, Vol. 710 Issue 1, p1007 

    Steady state and transient heat transport characteristics of He II channels have been investigated experimentally. Two parallel He II channels are separated by a spacer. Four kinds of spacer materials have been tested. One of them is FRP and the others are porous materials which can induce the...

  • Transient Heat Transport in Subcooled He II Associated with JT Effect. Maekawa, R.; Iwamoto, A.; Hamaguchi, S. // AIP Conference Proceedings;2004, Vol. 710 Issue 1, p991 

    Transient heat transport in subcooled He II has been investigated in a 1 m long rectangular channel with distributed contractions: one-closed end has a heater, while the other end is open to the He II bath. Experiments were conducted applying heat pulses and recording the temperature profile...

  • A Helium Based Pulsating Heat Pipe For Superconducting Magnets. Fonseca, Luis Diego; Miller, Franklin; Pfotenhauer, John // AIP Conference Proceedings;Jan2014, Vol. 1573, p28 

    This study was inspired to investigate an alternative cooling system using a helium-based pulsating heat pipes (PHP), for low temperature superconducting magnets. In addition, the same approach can be used for exploring other low temperature applications. The advantages of PHP for transferring...

  • Tokyo Axion Helioscope. Minowa, Makoto // AIP Conference Proceedings;8/30/2010, Vol. 1274 Issue 1, p133 

    The idea of a magnetic axion helioscope was first proposed by Pierre Sikivie in 1983. Tokyo axion helioscope was built exploiting its detection principle with a dedicated cryogen-free superconducting magnet and PIN photodiodes for x-ray detectors. Solar axions, if exist, would be converted into...

  • Cryogenics for a 5 Tesla Superconducting Solenoid with Large Aperture at DESY. Gadwinkel, E.; Herzog, H.; Lierl, H.; Notz, D.; Schaffran, J.; Schoeneburg, B. // AIP Conference Proceedings;2004, Vol. 710 Issue 1, p719 

    A large aperture superconducting solenoid-magnet with fields up to 5.25 Tesla is being set up as high field test facility at DESY. It is used to measure prototype time projection chambers foreseen as detectors for a future high energy physics collider experiment. The new cryogenic supply of this...

  • Cryogenic Active Magnetic Regenerator Test Apparatus. Tura, A.; Roszmann, J.; Dikeos, J.; Rowe, A. // AIP Conference Proceedings;2006, Vol. 823 Issue 1, p985 

    An AMR Test Apparatus (AMRTA) used in experiments near room-temperature required a number of modifications to allow for testing at cryogenic temperatures and with a 5 T magnetic field. The impacts of parasitic heat leaks, frictional heat generation, and eddy current heating in the AMRTA are...

  • Quench Induced Pressure Rise in the Cooling Pipes of the ATLAS Barrel Toroid Model. Haug, F.; Bottura, L.; Broggi, F.; Junker, S. // AIP Conference Proceedings;2004, Vol. 710 Issue 1, p711 

    The ATLAS superconducting magnet system consists of a Barrel Toroid, two End-Cap Toroids and a Solenoid. Eight individual racetrack coils will be assembled to form the Barrel Toroid with overall dimensions of 26 m length and 20 m diameter. In order to verify the design concept a 9 m long short...

  • Ceramic Current Lead Protects Liquid Helium. Boggs, Robert N. // Design News;12/16/91, Vol. 47 Issue 24, p91 

    Focuses on a ceramic current lead which reduces helium boil-off from cryogenic systems. Improvements to the lead's design; Heat transfer; Superconducting section; Temperatures at the copper section; Test setup for superconducting lead.

  • Numerical Analysis on Heat Transfer from a Flat Plate at One End of a Rectangular Duct with an Orifice Filled with Pressurized He II. Fujita, K.; Tatsumoto, H.; Shirai, Y.; Shiotsu, M. // AIP Conference Proceedings;2004, Vol. 710 Issue 1, p1015 

    Numerical analysis was performed on steady-state and transient heat transfer from a flat plate located at one-end of a rectangular duct with an orifice in pressurized He II for liquid temperatures from 1.8 to 2.1 K to clarify the effect of heat flow contraction and expansion. The model duct has...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics