Estimation of gas pipeline blowdown time requires the determination of the pressure-time history for the unsteady discharge of gas through a blowdown stack open to the atmosphere. Computational procedures entail various assumptions whose validity and contributions to the accuracy are often not assessed. This paper discusses the computational models and solution methods and further assesses the significance of the various assumption involved. Volume and pipe models, numerical and analytical methods of solution, effects of stack entrance and friction losses and discharge coefficient are evaluated. The accuracy of a particular model or method of solution is greatly dependent on the fL/D ratio of the pipe section under blowdown. Comparison with field measurements of a straight pipe section enabled evaluation of the above models.
Simulation of gas pipeline blowdown
Simulation des Blowdowns von Gasfernleitungen
1989
10 Seiten, 7 Bilder, 4 Tabellen, 19 Quellen
Aufsatz (Konferenz)
Englisch
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