垂直管中气液两相混输压降的实验研究  

Experimental Study on Pressure Drop of the Gas-Liquid Two-phase Flow in Vertical Pipes

作　　者：刘琪[1] 李军亮[1] 涂亚明[1] Liu Qi;Li Junliang;Tu Yaming(School of Petroleum Engineering, Yangtze University, Wuhan 430100, China)

机构地区：[1]长江大学石油工程学院,武汉430100

出　　处：《工程研究（跨学科视野中的工程）》2017年第4期372-376,共5页JOURNAL OF ENGINEERING STUDIES

摘　　要：本论文研究了气液两相混输流动参数变化对垂直管中气液两相混输压降的影响及压降的计算方法,实验工况为:压力范围为0～3.5MPa,液体表观流速为0.06～0.23m/s,管径为60mm,实验压降测量长度为8.0m。实验表明,液体流量和气液比都会影响垂直管气液两相流压降的大小。选择经典的Beggs-Brill模型进行出口压力预测,预测结果的平均误差为26.20%,不确定度为14.49%。进一步分析对压降计算敏感性最大的因素沿程阻力系数,采用数据拟合法对沿程阻力系数进行修正,进而对Beggs-Brill模型进行修正,修正后的Beggs-Brill模型计算出口压力的平均误差为12.92%,不确定为8.86%。在实际生产中,可以使用修正后的Beggs-Brill模型以更精确地计算气液两相混输垂直管的压降。In order to study how the pressure drop of gas-liquid flow in vertical pipes varies with flow parameters as well as its calculation method,we conducted experiments in key laboratory of oil and gas exploitation in the Yangtze university.The experimental conditions were as follows:the working pressure from0to3.5MPa,the superficial liquid velocity from0.06to0.23m/s,the pipe diameter of DN60,and the pressure drop measuring distance of8.0m.Experimental results show that liquid velocity and gas liquid ratio affect the value of pressure drop.The classical Beggs-Brill correlation was chosen to predict the value of exit pressure with an average error of26.20%and an uncertainty of14.49%.With the further research on the Beggs-Brill correlation,it’s found that the coefficient of drag coefficient of the path is the major factor which influences pressure drop.Finally,the Beggs-Brill correlation is modified by using the method of numerical fitting in the coefficient of drag coefficient of the path,and an average error and uncertainty of the modified Beggs-Brill correlation to predict the value of exit pressure are12.92%and8.86%respectively,so we can use the modified Beggs-Brill correlation to calculate the pressure drop of gas-liquid flow in vertical pipes more accurately.

关 键 词：气液两相流 垂直管 压降模型 Beggs-Brill 误差 不确定度 

分 类 号：O359.1[理学—流体力学]