Experiments have been carried out to analyze the evolution of the air/water flow structure along a horizontal 60 mm i.d. straight pipe. Plug and slug flow regimes were observed. In order to investigate the local structure of the flow, dynamic void fraction measurements have been performed by means of ring impedance probes. From dynamic void fraction measurements the mean void fraction values, the probability distributions of void, the liquid film height in the gas cavities and the slug frequencies have been evaluated. The analysis of the results showed that the flow structure deeply modifies along the pipe and that minor effects have to be ascribed to gas injection mode. The examination of the probability distribution function enabled the identification of the operating conditions at which the transition occurs, thus making it possible to propose a new objective criterion of identification.
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March 2001
Technical Papers
Gas-Liquid Distribution in the Developing Region of Horizontal Intermittent Flows
M. Fossa
M. Fossa
DITEC, Dipartimento di Termoenergetica e Condizionamento Ambientale, Universita` degli Studi di Genova, Via all’Opera Pia 15a-16145 Genova, Italy
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M. Fossa
DITEC, Dipartimento di Termoenergetica e Condizionamento Ambientale, Universita` degli Studi di Genova, Via all’Opera Pia 15a-16145 Genova, Italy
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division April 5, 2000; revised manuscript received November 17, 2000. Associate Editor: J. Lasheras.
J. Fluids Eng. Mar 2001, 123(1): 71-80 (10 pages)
Published Online: November 17, 2000
Article history
Received:
April 5, 2000
Revised:
November 17, 2000
Citation
Fossa, M. (November 17, 2000). "Gas-Liquid Distribution in the Developing Region of Horizontal Intermittent Flows ." ASME. J. Fluids Eng. March 2001; 123(1): 71–80. https://doi.org/10.1115/1.1343108
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