【摘要】 对高聚物减阻剂的减阻性能进行研究,考察了高聚物减阻剂的相对分子质量、起始点的管壁切应力τw*、减阻剂添加量、雷诺数及高聚物减阻剂的降解对减阻效果的影响。根据高聚物减阻剂的摩阻系数与雷诺数关系曲线,拟合得到高聚物减阻剂的斜率增量δ。结果表明,减阻剂的减阻率随相对分子质量的增大而提高;减阻剂的均方回转半径Rg越大,减阻起始点要求的管壁切应力τw*值越小,减阻效果越好;减阻剂的减阻率随添加量的增加而增大;减阻剂的斜率增量δ越大,减阻效果越好;高聚物减阻剂在一定剪切力下都会发生一定程度的降解,使减阻率下降。更多还原

【Abstract】 The drag reduction performance of polymer drag reducing agent(DRA)was studied and the effect of DRA molecular weight,dosage,the onset of the wall shear stress τw,Reynolds number and the degradation of polymer DRA on the drag reduction was investigated.From the curve of polymer DRA coefficient of friction vs Reynolds number,the slope delta δ of polymer DRA was obtained.Results showed that the drag reduction rate of polymer DRA increased with the increase of DRA molecular weight and dosage;the drag reduction effect was enhanced with the decrease of the onset of the wall shear stress τw and with the increase of the slope delta δ value;the degradation of polymer DRA might happen under certain shear stress resulting in the decrease of drag reduction rate.更多还原