TY - GEN
T1 - Neutron imaging calibration to measure void fraction
AU - Geoghegan, Patrick
AU - Bilheux, Hassina
AU - Sharma, Vishaldeep
AU - Fricke, Brian
PY - 2015
Y1 - 2015
N2 - Void fraction is an intuitive parameter that describes the fraction of vapor in a two-phase flow. It appears as a key variable in most heat transfer and pressure drop correlations used to design evaporating and condensing heat exchangers, as well as determining charge inventory in refrigeration systems. Void fraction measurement is not straightforward, however, and assumptions on the invasiveness of the measuring technique must be made. Neutron radiography or neutron imaging has the potential to be a truly non-invasive void fraction measuring technique but has until recently only offered qualitative descriptions of two-phase flow, in terms of flow maldistributions, for example. This paper describes the calibration approach necessary to employ neutron imaging to measure steady-state void fraction. Experiments were conducted at the High Flux Isotope Reactor (HFIR) Cold Guide 1D neutron imaging facility at Oak Ridge National Laboratory (ORNL), Oak Ridge, TN, USA.
AB - Void fraction is an intuitive parameter that describes the fraction of vapor in a two-phase flow. It appears as a key variable in most heat transfer and pressure drop correlations used to design evaporating and condensing heat exchangers, as well as determining charge inventory in refrigeration systems. Void fraction measurement is not straightforward, however, and assumptions on the invasiveness of the measuring technique must be made. Neutron radiography or neutron imaging has the potential to be a truly non-invasive void fraction measuring technique but has until recently only offered qualitative descriptions of two-phase flow, in terms of flow maldistributions, for example. This paper describes the calibration approach necessary to employ neutron imaging to measure steady-state void fraction. Experiments were conducted at the High Flux Isotope Reactor (HFIR) Cold Guide 1D neutron imaging facility at Oak Ridge National Laboratory (ORNL), Oak Ridge, TN, USA.
UR - http://www.scopus.com/inward/record.url?scp=85016793917&partnerID=8YFLogxK
U2 - 10.18462/iir.icr.2015.0612
DO - 10.18462/iir.icr.2015.0612
M3 - Conference contribution
AN - SCOPUS:85016793917
T3 - Refrigeration Science and Technology
SP - 294
EP - 301
BT - 24th IIR International Congress of Refrigeration, ICR 2015
PB - International Institute of Refrigeration
T2 - 24th IIR International Congress of Refrigeration, ICR 2015
Y2 - 16 August 2015 through 22 August 2015
ER -