Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/87489
Title: | Oxygen concentration variation in ullage influenced by dissolved oxygen evolution | Authors: | Feng, S Li, C Peng, X Wen, T Yan, Y Jiang, R Liu, W |
Issue Date: | 2020 | Source: | Chinese journal of aeronautics, 2020 | Abstract: | To determine the oxygen concentration variation in ullage that results from dissolved oxygen evolution in an inert aircraft fuel tank, the CFD method with a mass transfer source is applied in the present study. An experimental system is also designed to evaluate the accuracy of the CFD simulations. The dissolved oxygen evolution is simulated under different conditions of fuel load and initial oxygen concentration in ullage of an inert fuel tank with stimulations of heating and pressure decrease. The increase in the oxygen concentration in ullage ranges from 0.82% to 5.92% upon stimulation of heating and from 0.735% to 12.36% upon stimulation of a pressure decrease for an inert ullage in the simulations. The heating accelerates the release of the dissolved oxygen from the fuel by increasing the mass transfer rate in the mass transfer source and decreasing the pressure, thereby accelerating the dissolved oxygen evolution by increasing the concentration difference between the gas and the fuel. The time constant that represents the oxygen evolution rate is independent of the initial oxygen concentration in ullage of an inert tank but depends closely on the fuel load, temperature and pressure. The time constant can be fitted using a polynomial equation relating the fuel load to temperature in the heating stimulation with an accuracy of 4.77%. Upon stimulation of a pressure decrease, the time constant can be expressed in terms of the fuel load and the pressure, with an accuracy of 5.02%. | Keywords: | Computational Fluid Dynamics (CFD) Dissolved oxygen evolution Mass transfer Stimulation Time constant Volume of fluid |
Publisher: | Elsevier | Journal: | Chinese journal of aeronautics | ISSN: | 1000-9361 | EISSN: | 1000-9361 | DOI: | 10.1016/j.cja.2019.12.020 | Rights: | © 2020 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by-nc-nd/4.0/) The following publication Feng, S., Li, C., Peng, X., Wen, T., Yan, Y., Jiang, R., & Liu, W. (2020). Oxygen concentration variation in ullage influenced by dissolved oxygen evolution. Chinese Journal of Aeronautics, is available at https://doi.org/10.1016/j.cja.2019.12.020 |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Feng_Oxygen concentration variation.pdf | 2.56 MB | Adobe PDF | View/Open |
Page views
51
Last Week
0
0
Last month
Citations as of May 5, 2024
Downloads
36
Citations as of May 5, 2024
SCOPUSTM
Citations
10
Citations as of Apr 26, 2024
WEB OF SCIENCETM
Citations
8
Citations as of May 2, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.