CAJ | 학술논문

针对稠油水环输送的中心油流偏心问题，提出稠油流动边界层在AFS-2水基泡沫作用下的模拟实验方法，设计加工相应的管流模拟装置及泡沫发生、注入与泡沫层生成系统。用201甲基硅油模拟稠油，实验研究稠油在水基泡沫作用下的水平管流阻力特性，分析泡沫与硅油的流速与流量比对硅油流动流型和减阻效果的影响。基于上部泡沫-下部液膜复合边界层假设，建立硅油-泡沫-液膜中心环状水平管流的压降预测模型。结果表明：20℃室温下，当泡沫与硅油流量比为0.2～0.5时，硅油流动减阻率高于70%，其机理可归结为油壁间形成了上部泡沫-下部液膜的复合隔离润滑层；理论预测值与实验测量值吻合良好，相对误差为-17.55%～9.76%。
침대주유수배수송적중심유류편심문제，제출주유류동변계층재AFS-2수기포말작용하적모의실험방법，설계가공상응적관류모의장치급포말발생、주입여포말층생성계통。용201갑기규유모의주유，실험연구주유재수기포말작용하적수평관류조력특성，분석포말여규유적류속여류량비대규유류동류형화감조효과적영향。기우상부포말-하부액막복합변계층가설，건립규유-포말-액막중심배상수평관류적압강예측모형。결과표명：20℃실온하，당포말여규유류량비위0.2～0.5시，규유류동감조솔고우70%，기궤리가귀결위유벽간형성료상부포말-하부액막적복합격리윤활층；이론예측치여실험측량치문합량호，상대오차위-17.55%～9.76%。
According to the eccentricity of core oil flow in water-annulus transport of heavy oil, a simulated experiment for heavy oil flow boundary layer under the action of aqueous foam system-2 (AFS-2) (foam quality 50%) was proposed. A corresponding pipe flow simulated device and a system of foam generating, injecting and foam layer generating were designed and built. Flow resistance characteristics of heavy oil simulated by 201 methyl silicone oil under the action of aqueous foam in horizontal pipe were determined experimentally, and the influence of velocities and flow ratios of foam and silicone oil on silicone oil flow patterns and drag reduction was analyzed. Based on the hypothesis on complex boundary layer of upper foam-lower foam drainage film, a model for predicting pressure drop of silicone oil-foam-foam drainage film core-annular flow in horizontal pipe was established. At room temperature 20℃, drag reduction efficiency was above 70% when flow ratios of foam and silicone oil were between 0.2 and 0.5, and its mechanism of drag reduction could be the complex isolating-lubricating layer of upper foam-liquid film between oil and pipe wall. The predicted values were in good agreement with the experimental data, and relative errors were between-17.55% and 9.76%.