Neutron radiography of condensation and evaporation of hydrogen in a cryogenic condition
Document Type
Article
Publication Date
1-1-2015
Department
Department of Mechanical Engineering-Engineering Mechanics
Abstract
The condensation and evaporation of hydrogen under cryogenic conditions is visualized by using neutron imaging at the BT-2 Beam Facility at the National Institute of Standards and Technology (NIST). The condensation and evaporation are controlled by adjusting temperature (20 K ~ 23 K) and pressure (1.3 ~ 1.95 bar absolute). The hydrogen contained in the aluminum test cell inside the cryostat has a large attenuation coefficient due to its large scattering cross section. The high sensitivity of neutron radiography to hydrogen allows the visualization of a meniscus and a contact line of evaporating hydrogenated cryogenic propellants. The graphic represents the temperature, pressure and corresponding images of liquid hydrogen in the test cell. The test cell is made of Aluminum 6061 with an inner diameter of 12 mm. The captured images are then median filtered and post-processed in order to find the volume of liquid hydrogen in the test cell as a function of time. The condensation/evaporation rates obtained from neutron imaging along with corresponding temperature and pressure are used to validate the evaporation model being developed by the authors.
Publication Title
Journal of Heat Transfer
Recommended Citation
Bellur, K.,
Medici, E. F.,
Allen, J. S.,
Choi, C.,
Hermanson, J.,
Tamilarasan, A.,
Hussey, D.,
Jacobson, D.,
Leao, J.,
&
McQuillen, J.
(2015).
Neutron radiography of condensation and evaporation of hydrogen in a cryogenic condition.
Journal of Heat Transfer,
137(8).
http://doi.org/10.1115/1.4030442
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2430