Two tomographic techniques have been applied to the flow in a 67 mm internal diameter vertical pipe. One is Electrical Capacitance Tomography (ECT) mounted on the outside of the non-conducting pipe wall. Another technique, known as the Wire Mesh Sensor (WMS) was used. The measuring systems provide time and cross-sectionally resolved information about the spatial distribution of the phases. The information can be used to obtain space and time averaged void fractions, radial profiles of time averaged void fraction and cross-sectional averaged time series of void fraction. Simultaneous measurements were made with the two techniques for gas superficial velocities of 0.05–5.5 m/s and liquid superficial velocities of 0–0.7 m/s with air and silicone oil as the fluids. Bubble, slug and churn flows were identified from the characteristic signatures of the Probability Density Functions of the cross-sectionally averaged void fraction. In addition, the detailed shape of individual large bubbles has been extracted. The output of both instruments shows clearly that the shapes of the large bubbles in slug flow are distinctly different from the smooth bullet-shaped. In this larger diameter pipe, the interface is much more disturbed. In addition, flow can be classified according to the sizes of bubbles present. Distributions of bubble sizes are presented and the fractions of gas flowing in different bubble sizes classes quantified.
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ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2009
Honolulu, Hawaii, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4347-5
PROCEEDINGS PAPER
Interrogation of Gas/Oil Flow in a Vertical Using Two Tomographic Techniques
Lokman A. AbdulKareem,
Lokman A. AbdulKareem
University of Nottingham, Nottingham, UK
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Barry J. Azzopardi,
Barry J. Azzopardi
University of Nottingham, Nottingham, UK
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Sebastian Thiele,
Sebastian Thiele
Forschungszentrum Rossendorf-Dresden e.V., Dresden, Germany
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Marco J. Da Silva
Marco J. Da Silva
Forschungszentrum Rossendorf-Dresden e.V., Dresden, Germany
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Lokman A. AbdulKareem
University of Nottingham, Nottingham, UK
Barry J. Azzopardi
University of Nottingham, Nottingham, UK
Sebastian Thiele
Forschungszentrum Rossendorf-Dresden e.V., Dresden, Germany
Andrew Hunt
Tomoflow Ltd., Cheshire, UK
Marco J. Da Silva
Forschungszentrum Rossendorf-Dresden e.V., Dresden, Germany
Paper No:
OMAE2009-79840, pp. 559-566; 8 pages
Published Online:
February 16, 2010
Citation
AbdulKareem, LA, Azzopardi, BJ, Thiele, S, Hunt, A, & Da Silva, MJ. "Interrogation of Gas/Oil Flow in a Vertical Using Two Tomographic Techniques." Proceedings of the ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. Volume 7: Offshore Geotechnics; Petroleum Technology. Honolulu, Hawaii, USA. May 31–June 5, 2009. pp. 559-566. ASME. https://doi.org/10.1115/OMAE2009-79840
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