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ISSN: 0276-1459 Print
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DOI: 10.1615/MultScienTechn.v21.i1-2
Pages: 185
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DOI: 10.1615/MultScienTechn.v21.i1-2.120
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Article price - $45.00 |
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A NEW METHOD OF MEASURING TWO-PHASE MASS FLOW RATES IN A VENTURI
He Peixiang
Faculty of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
Cees W. M. van der Geld
Department of Mechanical Engineering, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
Claudio Alimonti
Al University “La Sapienza” of Rome, Italy
Julio Cesar Passos
Departamento de Enga. Mecânica-LEPTEN/Boiling-Centro Tecnológico, Universidade Federal de Santa Catarina, Campus Universitário, 88.040-900 Florianópolis-SC, Brazil
ABSTRACT
Metering of the individual flow rates of gas and liquid in a multicomponent flow is of great importance for the oil industry. A convenient, nonintrusive way of measuring these is the registration and analysis of pressure drops over parts of a venturi. Commercially available venturi-based measuring equipment is costly because it also measures the void fraction. This paper presents a method to deduce the individual mass flow rates of air and water from pressure drop ratios and fluctuations in pressure drops. Not one but two pressure drops are used and not only time-averaged values of pressure drops are utilized. As a proof-of-principle, prediction results for a horizontal and vertical venturi are compared with measurements for void fractions up to 80%. Residual errors are quantified and the effect of variation of equipment and of slip correlation is shown to be negligible. At relatively low cost a good predictive capacity of individual mass flow rates is obtained.
REFERENCES
Caudullo, A., Flussi Bifase in un Venturimetro. Falcone, G., Hewitt, G. F., Lao, L., and Richardson, S. M., ANUMET: A novel wet gas flowmeter. DOI: 10.2118/84504-MS van der Geld, C. W. M., On phase distribution transitions in vertical evaporator tubes. Schmidt, J., Giesbrecht, H., and van der Geld, C. W. M., Phase and velocity distributions in vertically upward high-viscosity two-phase flow. DOI: 10.1016/j.ijmultiphaseflow.2007. Shen, W. and Wang, J., Flow Meter Design Manual. Thorn, R., Johansen, G. A, and Hammer, W. A., Recent developments in three-phase flow measurement. Tutu, N. K., Pressure fluctuations and flow pattern recognition in vertical two phase gas-liquid flows. DOI: 10.1016/0301-9322(82)90053-2 Caudullo, A., Flussi Bifase in un Venturimetro. Falcone, G., Hewitt, G. F., Lao, L., and Richardson, S. M., ANUMET: A novel wet gas flowmeter. DOI: 10.2118/84504-MS van der Geld, C. W. M., On phase distribution transitions in vertical evaporator tubes. Schmidt, J., Giesbrecht, H., and van der Geld, C. W. M., Phase and velocity distributions in vertically upward high-viscosity two-phase flow. DOI: 10.1016/j.ijmultiphaseflow.2007.10.013 Shen, W. and Wang, J., Flow Meter Design Manual. Thorn, R., Johansen, G. A, and Hammer, W. A., Recent developments in three-phase flow measurement. Tutu, N. K., Pressure fluctuations and flow pattern recognition in vertical two phase gas-liquid flows. DOI: 10.1016/0301-9322(82)90053-2
pages 157-168
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