关键词: 垂直上升管, 油水乳状液, 流动特性, 实验研究

Abstract: In the petroleum and chemical industry,oil and water two immiscible liquids often flow together.Because the oil water emulsion widely exists and the water fraction in the crude oil increased,a lot of liquids produced which increased the weight of oil and gas transporting process.This causes a lot of new problems for the technology and the equipment of the transportation system.In this paper,an experimental investigation of water in oil(W/O)and oil in water (O/W) oil water emulsions have been taken detailly in upward vertical tube.The experimental parameters are:Water fraction ε_W=0.0～1.0;Pressure p=0.1～0.6MPa;Flowrate M=0.14～1.7Kg/S;Temperature T=10～45℃ A new correlation of effective viscosity for oil water emulsions is obtained according to the experimental results,it is better than that of in the literature.The results predicted by the co rrelation agree with that of experiment well.A correlation is also obtained to determine the phase inversion point.The relationship of the flow patterns of the oil water emulsions with the flow rate and temperature at the phase inversion point are analyzed.At the same time,a method to calculate the frictional pressure drop by the correlation between the Reynold number and the frictional factor is attained and another new method is attained to whether the oil water emulsions are Newtonian or Non Newtonian fluids.The results are useful to design the pipeline transportation system in some degree.

Key words: upward vertical tube, oil-water emulsion, flow characteristics, experimental investigation