Measurement of the oil holdup for a two-phase oil-water flow through a sudden contraction in a horizontal pipe

31st UIT (Italian Union of Thermo-fluid-dynamics) Heat Transfer Conference 2013

Colombo, L.P.M.^1 ; Guilizzoni, M.^1 ; Sotgia, G.M.^1 ; Bortolotti, S.^1 ; Pavan, L.^1

Politecnico di Milano, Department of Energy, Via Lambruschini 4, 20156 Milan, Italy^1

关键词: Distribution parameters;    Drift flux modeling;    Flow pattern visualization;    Horizontal ducts;    Horizontal pipes;    Oil water flow;    Oil-water two phase flows;    Sudden contraction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/501/1/012015/pdf
DOI  :  10.1088/1742-6596/501/1/012015

来源: IOP

【 摘 要 】

Oil-water two-phase flow experiments were conducted in a horizontal duct made of Plexiglas® to determine the holdup of oil by means of the quick closing valves technique, using mineral oil (viscosity: 0.838 Pa s at 20 °C; density: 890 kg m-3) and tap water. The duct presents a sudden contraction, with contraction ratio of 0.64. About 200 tests were performed by varying the flow rates of the phases. Flow patterns were investigated for both the up- and downstream pipe. Due to the relatively high value of the contraction ratio, it was not observed any relevant variation of the flow patterns across the sudden contraction. Data were then compared with predictions of a specific correlation for oil-water flow and some correlations for gas-water flow. A drift-flux model was also applied to determine the distribution parameter. The results agree quite well with flow pattern visualization.