水平圆管油水两相变质量分层流压降计算

以往对水平圆管中复杂流体介质的流动规律研究的对象均是对水平圆管单相和气液两相变质量流动,关于存在壁面入流条件的水平圆管油水两相变质量流动的研究较少。为此对水平圆管油水两相变质量分层流动进行了微元分析,考虑壁面入流对其中油水两相变质量分层流动压降的影响,分别对油水两相应用连续性方程和动量守恒方程,得出了水平圆管油水两相变质量分层流动的基本模型和压降计算模型。通过模型求解揭示了在壁面入流条件下沿水平圆管的压降规律,并分析了壁面入流、圆管直径、油相黏度和含水率等主要参数对其中压降规律的影响。计算结果表明,当油相黏度较大时,随含水率的增加,沿水平圆管压降降低;而油相黏度较小时,随含水率的增加,沿水平圆管压降升高。

Pressure - drop calculation of oil - water two - phase variable mass stratified flow in horizontal pipelines

This paper presents a model for pressure-drop calculation of oil-water two-phase variable mass stratified flow in horizontal pipelines. The influence of inflow through perforation channels was taken into consideration and the model of oil-water variable mass stratified flow in horizontal pipelines was established by infinitesimal analysis. The mass and momentum conservation equations were established for oil and water phase respectively in the model, where the influence of wall inflow on pressure drop was considered. The basic model and pressure drop calculation model were established for oil-water two-phase variable mass stratified flow in horizontal pipelines. The influence of the following factors, such as inflow through perforation channels, the diameter of pipeline, and the viscosity of oil and water, on the pressure-drop in horizontal pipeline was simulated. The calculation result shows that pressure-drop along pipeline decreases with the increases of water cut when the viscosity of oil is higher than water and pressure-drop increases with the increases of water cut when the viscosity of oil is lower on the condition of exiting inflow.