加聚合物型减阻剂环状流摩阻系数新显式方程
New Friction Coefficient Explicit Equation of Annular Flow with Polymer Drag Reducer
浏览(1559) 下载(6)
- 引用格式:
-
李雷,代晓东,郝勇超.加聚合物型减阻剂环状流摩阻系数新显式方程[J].天然气与石油,2018,36(6):0.doi:
LiLei , Dai Xiaodong, ,Hao Yongchao.New Friction Coefficient Explicit Equation of Annular Flow with Polymer Drag Reducer[J].Natural Gas and Oil,2018,36(6):0.doi:
- DOI:
- 作者:
- 李 雷1 代晓东1,2 郝勇超1
LiLei1 ， Dai Xiaodong1,2 ,Hao Yongchao1
- 作者单位:
- 1. 中国石油大学胜利学院油气工程学院，2. 中国石油大学国家大学科技园博士后工作站
1.College of Petroleum Engineering， Shengli College， China University of Petroleum， DongYing， Shandong， 257000 China; 2.Post-Doctoral Working Station of National University Science Park， China University of Petroleum ( EastChina) ， DongYing， Shandong， 257100， China
- 关键词:
- 聚合物型减阻剂;环状流;摩阻系数;曲线拟合;最小二乘法
Poiymer drag reducer; Annular flow; Friction coefficient; Curve fitting; Least square method
- 摘要:
-
向输油管道中加入聚合物型减阻剂是实现管道输送降本增效目标的有效方法。针对准确预测加入聚合物型减阻剂环状流摩阻系数的问题,通过对前期实验数据进行量纲分析和曲线拟合,基于边界层的对数速度分布和幂律分布推导了新显式方程。再采用最小二乘法对新显式方程进行校准,对加入聚合物型减阻剂的气液混合物进行摩阻系数预测,以减阻率为衡量标准,将计算结果与实验数据和AlSarkhi的计算结果进行比较,可知新显式方程对实验数据拟合度更好,并且随着气体表观速度的增大,减阻率预测值逐渐减小。
Adding polymer drag reducer in to the oil pipeline is an effective methodto achieve the goal of reducing the resistance and consumption.In order to predict the frictioncoefficient of the annular flow with polymer drag reducer， the dimensional analysis and curve fitting were carried out through the previous experimental data， and the new explicit equation was derived based on the logarithmic velocity distribution and power law distribution of the boundary layer.Then， the equation was calibrated by the 1east square method， and the friction coefficient was predicted for the gas-liquid mixture with polymer drag reducer.Taking the drag reductionrate as scale standard， the calculationresults were compared with the experimental data and the results of Al-Sarkhi， and it was found that the explicit equation had better experimental data fitting and the meanabsolute percentage error is reducedto 0.062 .The results also showed the predicted va1ue of drag reduction rate decreased with the increase of superficial gas velocity.
