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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN 印刷: 0276-1459
ISSN オンライン: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v21.i1-2.50
pages 51-64

PARTICLE IMAGE VELOCIMETRY, GAMMA DENSITOMETRY, AND PRESSURE MEASUREMENTS OF OIL-WATER FLOW

W. A. S. Kumara
Telemark University College, P. O. Box 203, N-3901, Porsgrunn, Norway
B. M. Halvorsen
Telemark University College, P. O. Box 203, N-3901; Telemark R&D Centre (Tel-Tek), Kjolnes ring, N-3918, Porsgrunn, Norway
M. C. Melaaen
Telemark University College, P. O. Box 203, N-3901; Telemark R&D Centre (Tel-Tek), Kjolnes ring, N-3918, Porsgrunn, Norway

要約

Oil-water flow in a horizontal pipe was investigated using particle image velocimetry (PIV), gamma densitometry, and pressure measurements. The experimental activities were performed using the multiphase flow loop at Telemark University College, Porsgrunn, Norway. The multiphase flow loop consisted of a 15-m-long steel pipe with an inner diameter of 56 mm. Water (density 996 kg/m3, viscosity 1 mPa s) and Exxsol D60 oil (density 790 kg/m3, viscosity 1.6 mPa s) were used as test fluids. The experiments were performed at different mixture velocities and water cuts. Mixture velocity and water cut varied up to 1.06 m/s and 1.0, respectively. The time-averaged cross-sectional distributions of oil and water were measured using a traversable gamma densitometer. The pressure drop along the test section of the pipe was also measured. The flow regimes were determined by visual observations. The instantaneous local velocities were measured using PIV, and based on the instantaneous local velocities mean velocities and turbulence profiles were calculated. The highest root mean-squared velocity components of streamwise (U-rms) and wall normal (V-rms), and Reynolds stress values were observed close to the pipe wall due to large mean axial velocity gradients. A damping effect of the Reynolds stress was observed close to the oil-water interface due to stable density stratification. PIV measurements are compared with laser doppler anemometry (LDA) measurements that were performed on a similar experimental setup by Elseth et al. (2000). The measured mean axial velocity and turbulence profiles using PIV are observed to compare favorably with LDA measurements.

参考

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  2. Angeli, P. and Hewitt, G. F., Pressure gradient in horizontal liquid-liquid flows.

  3. Elseth, G., Kvandal, H. K., and Melaaen, M. C., Measurement of velocity and phase fraction in stratified oil-water flow.

  4. Guzhov, A. I., Grishin, A. D., Medvedev, V. F., and Medvedeva, O. P., Emulsion formation during the flow of two immiscible liquids in a pipe.

  5. Nadler, M. and Mewes, D., Flow induced emulsification in the flow of two immiscible liquids in horizontal pipes. DOI: 10.1016/S0301-9322(96)00055-9

  6. Rodriguez, O. M. H. and Oliemans, R. V. A., Experimental study of oil-water flow in horizontal and slightly inclined pipes. DOI: 10.1016/j.ijmultiphaseflow.2005.11.001

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  8. Vestol, S. and Melaaen, M. C., Velocity profile measurements on stratified two-phase gas-liquid flow in horizontal and downwardly inclined pipes using PIV.