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Prediction of Mass Flow Rate in Supersonic Natural Gas Processing

Authors :
Wen Chuang
Cao Xuewen
Yang Yan
Feng Yuqing
Source :
Oil & Gas Science and Technology, Vol 70, Iss 6, Pp 1101-1109 (2015)
Publication Year :
2015
Publisher :
EDP Sciences, 2015.

Abstract

The mass flow rate of natural gas through the supersonic separator was numerically calculated by various cubic equations of state. The numerical results show that the compressibility factor and specific heat ratio for ideal gas law diverge remarkably from real gas models at a high inlet pressure. Simultaneously, the deviation of mass flow calculated by the ideal and real gas models reaches over 10 %. The difference increases with the lower of the inlet temperature regardless of the inlet pressure. A higher back pressure results in an earlier location of the shock wave. The pressure ratio of 0.72 is the first threshold to get the separator work normally. The second threshold is 0.95, in which case the whole flow is subsonic and cannot reach the choked state. The shock position moves upstream with the real gas model compared to the ideal gas law in the cyclonic separation section.

Details

Language :
English, French
ISSN :
12944475 and 19538189
Volume :
70
Issue :
6
Database :
Directory of Open Access Journals
Journal :
Oil & Gas Science and Technology
Publication Type :
Academic Journal
Accession number :
edsdoj.6e8d0e54e28243da8b3f872eeecd290d
Document Type :
article
Full Text :
https://doi.org/10.2516/ogst/2013197