关键词: 聚丙烯酰胺, 溶液, 流动, 压降梯度, 减阻率, 黏度

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