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Influence of phase change on self-pressurization in cryogenic tanks under microgravity

Fu, Juan LU ; Sundén, Bengt LU ; Chen, Xiaoqian and Huang, Yiyong (2015) In Applied Thermal Engineering 87. p.225-233
Abstract
Future operations of many fluid, thermal and power systems and their ability to store, transfer, and manage a variety of single or multiphase fluids in reduced gravity environment are of great importance. For many of these systems, cryogenic conditions will play an important role. Cryogenic vaporization, caused by heat leakage into the tank from the surrounding environment, is one of the main causes of mass loss and leads to self-pressurization of the storage tanks. Available publications on self-pressurization and stratification of cryogenic tanks mainly focus on the convection and surface evaporation influences. Because large superheats increase the likelihood of evaporation in the liquid, the evaporation and its effect on vapor pressure... (More)
Future operations of many fluid, thermal and power systems and their ability to store, transfer, and manage a variety of single or multiphase fluids in reduced gravity environment are of great importance. For many of these systems, cryogenic conditions will play an important role. Cryogenic vaporization, caused by heat leakage into the tank from the surrounding environment, is one of the main causes of mass loss and leads to self-pressurization of the storage tanks. Available publications on self-pressurization and stratification of cryogenic tanks mainly focus on the convection and surface evaporation influences. Because large superheats increase the likelihood of evaporation in the liquid, the evaporation and its effect on vapor pressure under microgravity is studied numerically in this paper. The effects of reduced gravity, contact angle of the vapor bubble, and surface tension are investigated. The computations are carried out by using the CFD software package, Ansys Fluent, and an in-house developed code to calculate the source term associated with the phase change. A coupled level set and the volume-of-fluid method (CLSVOF) are used to solve a single set of conservation equations for the whole domain and the interface between the two phases is tracked or captured. A heat and mass transfer model is implemented into the Fluent code for solving problems involving evaporation or condensation. Results show that small tiny vapor regions caused by the evaporation process change the pressure rise. Vortices are observed due to the vapor dynamics. (C) 2015 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Cryogenics, Reduced gravity, Evaporation, Self-pressurization
in
Applied Thermal Engineering
volume
87
pages
225 - 233
publisher
Elsevier
external identifiers
  • wos:000359504500023
  • scopus:84930200527
ISSN
1359-4311
DOI
10.1016/j.applthermaleng.2015.05.020
language
English
LU publication?
yes
id
7128e286-48e5-440c-92af-6ea016dd1d6f (old id 7972287)
date added to LUP
2015-09-23 09:40:04
date last changed
2017-10-01 03:04:32
@article{7128e286-48e5-440c-92af-6ea016dd1d6f,
  abstract     = {Future operations of many fluid, thermal and power systems and their ability to store, transfer, and manage a variety of single or multiphase fluids in reduced gravity environment are of great importance. For many of these systems, cryogenic conditions will play an important role. Cryogenic vaporization, caused by heat leakage into the tank from the surrounding environment, is one of the main causes of mass loss and leads to self-pressurization of the storage tanks. Available publications on self-pressurization and stratification of cryogenic tanks mainly focus on the convection and surface evaporation influences. Because large superheats increase the likelihood of evaporation in the liquid, the evaporation and its effect on vapor pressure under microgravity is studied numerically in this paper. The effects of reduced gravity, contact angle of the vapor bubble, and surface tension are investigated. The computations are carried out by using the CFD software package, Ansys Fluent, and an in-house developed code to calculate the source term associated with the phase change. A coupled level set and the volume-of-fluid method (CLSVOF) are used to solve a single set of conservation equations for the whole domain and the interface between the two phases is tracked or captured. A heat and mass transfer model is implemented into the Fluent code for solving problems involving evaporation or condensation. Results show that small tiny vapor regions caused by the evaporation process change the pressure rise. Vortices are observed due to the vapor dynamics. (C) 2015 Elsevier Ltd. All rights reserved.},
  author       = {Fu, Juan and Sundén, Bengt and Chen, Xiaoqian and Huang, Yiyong},
  issn         = {1359-4311},
  keyword      = {Cryogenics,Reduced gravity,Evaporation,Self-pressurization},
  language     = {eng},
  pages        = {225--233},
  publisher    = {Elsevier},
  series       = {Applied Thermal Engineering},
  title        = {Influence of phase change on self-pressurization in cryogenic tanks under microgravity},
  url          = {http://dx.doi.org/10.1016/j.applthermaleng.2015.05.020},
  volume       = {87},
  year         = {2015},
}