Abstract: This passage studies the flow characteristics of polyacrylamide （PAM） solution in a pipeline at the common concentration range of gathering lines. The experiments were carried out in a 25.4 mm nominal bore horizontal double-wall pipeline which is made up of stainless-steel and can be temperature controlled by a water bath. The results show that：there is a critical concentration point existing on the influence of temperature on pressure drop gradient，after the concentration point the pressure drop gradient decreases with the rise of temperature，before the critical concentration point pressure drop gradient increasing with the rise of temperature would occur，the critical concentration point is related to velocity；the pressure drop gradient first decreases then increases with the rise of PAM concentration，the minimum pressure drop point would move backwards with the decrease of velocity and rise of temperature. The drug reduction efficiency increases with the rise of temperature，the maximum drug reduction point would move backwards with the decrease of velocity and rise of temperature. The polyacrylamide solution shows an apparent property of shear thinning. Through the analysis of the experimental data an equation set of PAM solution’s mixture viscosity is obtained.

Key words: polyacrylamide, solution, flow, pressure drop gradient, drug reduction efficiency, viscosity

摘要： 采用可控温不锈钢环道对集输管道常见浓度范围内含聚丙烯酰胺水溶液的流动特性进行了室内实验研究。研究结果表明：温度对聚丙烯酰胺溶液压降梯度的影响存在一个临界浓度，在临界浓度后，聚丙烯酰胺溶液的压降梯度随温度的升高逐渐减小，在临界浓度前会出现随温度升高压降梯度增大的现象；压降梯度随聚丙烯酰胺浓度的升高先减小后增大，随流速的降低、温度的升高聚丙烯酰胺溶液的最低压降点后移。减阻率随流速的升高逐渐增大；随流速的降低、温度的升高最高减阻率点后移。聚丙烯酰胺溶液表现出明显的剪切稀释性。通过对实验数据的分析得到了聚丙烯酰胺溶液的增黏特性占主要地位时其混合黏度符合的方程组。

关键词: 聚丙烯酰胺, 溶液, 流动, 压降梯度, 减阻率, 黏度