基于界面形态修正的油水层状流模型研究
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摘要
在内径为20 mm的管道内开展了水平油水两相流实验,实验中观察到油水分层(ST)流型、波状(SW)流型及存在液滴夹带现象的双连续(DC)流型。利用双环形电导探针及平行线电导探针测量了油水分层界面形态及界面波动特征,同时利用差压传感器测量了油水两相流在不同流型下的压降,建立了基于油水界面形态及波动特性的逆向双流体模型。研究结果表明,对于ST和SW流型,基于油水界面特性修正的逆向双流体模型对分相表观流速预测效果优于标准双流体模型;而对于DC流型,修正的逆向双流体模型预测结果改善不明显,表明双流体模型在液滴夹带特征明显的DC流型中应用具有一定的局限性。
An experiment of oil-water two-phase flow was carried out in a horizontal pipe with an inner diameter of 20 mm. Three flow patterns were observed in the experiment, i.e., stratified flow(ST), stratified wavy flow(SW) and dual-nontinues flow with droplet entrainment(DC). The configuration and the wavy characteristics of oil-water interface were measured using a double-ring conduce probe and a parallel-wire conduce probe. Meanwhile, the pressure drop of oil-water flow with different flow patterns was detected using a differential pressure transducer. A modified reverse two-fluid model was built based on the measured oil-water interface characteristics. It is found that,for ST and SW flow patterns, the prediction of oil and water superficial velocities by the modified reverse two-fluid model is better than that predicted by the standard two-fluid model. However, for DC flow pattern, the prediction accuracy of the modified model is not obviously improved. Thus,we conclude that the modified two-fluid model has limitations in the flow rate prediction of DC flow pattern which is characterized by obvious droplet entrainment.
An experiment of oil-water two-phase flow was carried out in a horizontal pipe with an inner diameter of 20 mm. Three flow patterns were observed in the experiment, i.e., stratified flow(ST), stratified wavy flow(SW) and dual-nontinues flow with droplet entrainment(DC). The configuration and the wavy characteristics of oil-water interface were measured using a double-ring conduce probe and a parallel-wire conduce probe. Meanwhile, the pressure drop of oil-water flow with different flow patterns was detected using a differential pressure transducer. A modified reverse two-fluid model was built based on the measured oil-water interface characteristics. It is found that,for ST and SW flow patterns, the prediction of oil and water superficial velocities by the modified reverse two-fluid model is better than that predicted by the standard two-fluid model. However, for DC flow pattern, the prediction accuracy of the modified model is not obviously improved. Thus,we conclude that the modified two-fluid model has limitations in the flow rate prediction of DC flow pattern which is characterized by obvious droplet entrainment.
引文
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[11] Edomwonyi-Otu L C, Angeli P. Pressure Drop and Holdup Predictions in Horizontal Oil-Water Flows for Curved and Wavy Interfaces[J]. Chemical Engineering Research&Design, 2015, 93:55-65
[12] Hadziabdic M, Oliemans R V A. Parametric Study of a Model for Determining the Liquid Flow-Rates from the Pressura Drop and Wwater Hold-up in Oil-Water Flows[J]. International Journal of Multiphase Flow, 2007,33(12):1365-1394
[13] Zhai L S, Jin N D, Zong Y B, et al. Experimental Flow Pattern Map, Slippage and Time-Frequency Representation of Oil-Water Two-Phase Flow in Horizontal Small Diameter Pipes[J]. International Journal of Multiphase Flow, 2015, 76:168-186
[14] Zhai L S, Bian P, Gao Z K, et al. The Measurement of Local Flow Parameters for Gas-Liquid Two-Phase Bubbly Flows Using a Dual-Sensor Probe Array[J]. Chemical Engineering Science, 2016, 144:346-363
[15] Zhai L S, Bian P, Han Y F, et al. The Measurement of Gas-Liquid Two-Phase Flows in a Small Diameter Pipe Using a Dual-Sensor Multi-electrode Conductance Probe[J]. Measurement Science&Technology, 2016, 27(4):045101
[2] Trallero J L, Sarica C, Brill J P. A Study of Oil-Water Flow Patterns in Horizontal Pipes[J]. SPE Production&Facilities, 1997, 8:165-172
[3] Rodriguez O M H, Oliemans R V A. Experimental Study on Oil-Water Flow in Horizontal and Slightly Inclined Pipes[J]. International Journal of Multiphase Flow, 2006,32(3):323-343
[4] Al-Wahaibi T, Angeli P. Experimental Study on Interfacial Waves in Stratified Horizontal Oil-Water Flow[J].International Journal of Multiphase Flow, 2011, 37(8):930-940
[5] Barral A H, Angeli P. Interfacial Characteristics of Stratified Liquid-liquid Flows Using a Conductance Probe[J].Experiments in Fluids, 2013, 54(10):1604-1609
[6] Barral A H, Angeli P. Spectral Density Analysis of the Interface in Stratified Oil-Water Flows[J]. International Journal of Multiphase Flow, 2014, 65:117-126
[7]Barral A H, Ebenezer A, Angeli P. Investigations of Interfacial Waves at the Inlet Section in Stratified Oil-Water Flows[J]. Experimental Thermal&Fluid Science, 2015,60:115-122
[8] Brauner N, Maron D M, Rovinsky J. A Two-Fluid Model for Stratified Flows with Curved Interfaces[J]. International Journal of Multiphase Flow, 1998, 24(6):975-1004
[9] Ng T S, Lawrence C J, Hewitt G F. Laminar Stratified Pipe Flow[J]. International Journal of Multiphase Flow,2002, 28(6):963-996
[10] Rodriguez O M H, Baldani L S. Prediction of Pressure Gradient and Holdup in Wavy Stratified Liquid-Liquid Inclined Pipe Flow[J]. Journal of Petroleum Science&Engineering, 2012(96/97):140-151
[11] Edomwonyi-Otu L C, Angeli P. Pressure Drop and Holdup Predictions in Horizontal Oil-Water Flows for Curved and Wavy Interfaces[J]. Chemical Engineering Research&Design, 2015, 93:55-65
[12] Hadziabdic M, Oliemans R V A. Parametric Study of a Model for Determining the Liquid Flow-Rates from the Pressura Drop and Wwater Hold-up in Oil-Water Flows[J]. International Journal of Multiphase Flow, 2007,33(12):1365-1394
[13] Zhai L S, Jin N D, Zong Y B, et al. Experimental Flow Pattern Map, Slippage and Time-Frequency Representation of Oil-Water Two-Phase Flow in Horizontal Small Diameter Pipes[J]. International Journal of Multiphase Flow, 2015, 76:168-186
[14] Zhai L S, Bian P, Gao Z K, et al. The Measurement of Local Flow Parameters for Gas-Liquid Two-Phase Bubbly Flows Using a Dual-Sensor Probe Array[J]. Chemical Engineering Science, 2016, 144:346-363
[15] Zhai L S, Bian P, Han Y F, et al. The Measurement of Gas-Liquid Two-Phase Flows in a Small Diameter Pipe Using a Dual-Sensor Multi-electrode Conductance Probe[J]. Measurement Science&Technology, 2016, 27(4):045101