Numerical Investigation of Gas Mixture Length of Nitrogen Replacement in Large-Diameter Natural Gas Pipeline without Isolator
Joint Authors
Source
Journal of Applied Mathematics
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-03-25
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Nitrogen replacement is a key process for natural gas pipeline before it is put into operation.
A computational fluid dynamic model coupled to a species-transportation model has been used to investigate the gas mixture length of nitrogen replacement in large-diameter pipeline without isolator.
A series of numerical simulations are performed over a range of conditions, including pipe length and diameter, inlet rate, and inclination angle of pipe.
These affecting factors are analyzed in detail in terms of volume fraction of nitrogen, the maximum gas mixture length, and gas mixture length varied with time.
Gas mixture length increases over time, and the maximum gas mixture length is present at outlet of pipe.
Long and large-diameter pipe and fast speed of nitrogen lead to long length of mixed gas, while large inclination angle of pipe brings about short length.
Several fitting formulas have been obtained, which can predict the maximum gas mixture length in gas pipelines.
The used method of fitting formula is shown in the paper by examples.
The results provide effective guidance for practical operation of nitrogen replacement.
American Psychological Association (APA)
Zhu, Hongjun& Han, Qinghua. 2014. Numerical Investigation of Gas Mixture Length of Nitrogen Replacement in Large-Diameter Natural Gas Pipeline without Isolator. Journal of Applied Mathematics،Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-480089
Modern Language Association (MLA)
Zhu, Hongjun& Han, Qinghua. Numerical Investigation of Gas Mixture Length of Nitrogen Replacement in Large-Diameter Natural Gas Pipeline without Isolator. Journal of Applied Mathematics No. 2014 (2014), pp.1-11.
https://search.emarefa.net/detail/BIM-480089
American Medical Association (AMA)
Zhu, Hongjun& Han, Qinghua. Numerical Investigation of Gas Mixture Length of Nitrogen Replacement in Large-Diameter Natural Gas Pipeline without Isolator. Journal of Applied Mathematics. 2014. Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-480089
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-480089