通过研究不同分子量、不同浓度的部分水解聚丙烯酰胺(HPAM)溶液的流变性能,并测试其在大型摩擦阻力测试装置中的压差,探究聚合物浓度、聚合物分子量等因素对HPAM溶液在非光滑管路中减阻性能的影响。结果表明,在实验条件范围内,聚合物分子量增大,溶液的减阻率先降低后升高;聚合物的浓度增大,溶液的减阻率降低。通过计算得到了HPAM溶液在内径为0.46 cm非光滑管路中流动时的摩擦阻力系数f和广义雷诺数Re并与HPAM溶液流型参数n相关联,建立了表征非光滑管路中聚合物溶液摩擦阻力系数新方程,同时建立了聚合物溶液摩擦阻力系数f与广义雷诺数Re、减阻率DR与广义雷诺数Re的经验关系,便于HPAM溶液的工程应用。

The rheological property of partially hydrolyzed polyacrylamide (HPAM) solution with different molecular weight and different concentrations are studied,the pressure difference of HPAM solution is tested in a large scale frictional resistance testing device,and therefore the effects of polymer concentration and polymer molecular weight on the drag reduction performance of HPAM solution are investigated in non-smooth pipeline.It is found that under the testing conditions,the drag reduction percentage of HPAM solution decreases initially and increases then as the molecular weight of the polymer increases;The drag reduction percentage of HPAM solution decreases as the concentration of the polymer increases.The frictional resistance coefficient (f) and the generalized Reynolds number (Re) of HPAM solution are obtained when it flows in a non-smooth pipeline with an inner diameter of 0.46 cm,and these two parameters are correlated with the flow pattern parameter n of HPAM solution.A novel equation is established for characterizing the friction drag coefficient of polymer solution in non-smooth pipeline.The empirical relationship between f and Re and the empirical relationship between the drag reduction rate (DR) and Re are also established,which is convenient for the engineering application of HPAM solution.

田珍瑞(1999-),男,硕士生,研究方向为压裂液流变学,y82210076@mail.ecust.edu.cn。