PAM水溶液浓度对圆管紊流速度剖面的影响

EFFECT OF PAMSOLUTON CONCENTRATION ON TURBULENT VELOCITY IN PIPE FLOW

将Ｃｒｔｏｓ流体本构方程和紊流随机理论相结合，得出了该流体在圆管中紊流流动下的速度分布规律。理论分析确定了该流体的圆管紊流壁面影响尺度，并由实验数据得出了速度分布规律中的各种系数，数值求解结果表明，随ＰＡＭ浓度的增加．速度剖面有增大的趋势，该结论和有关减阻理论是相吻合的。

Based on the constitutive equation of Cross Fluid combined with turbulentstochastic theory,the turbulent velocity distribution in pipe flow was obtained.The scaleaffecting on Cross Fluid wall in pipe turbulent flow was determined on the basis of theoreticalanalysis,The coefficient of velocity distribution formulae was obtained according to theexperimental data,The numerical result shows that velocity profiles enhance with the increaseof concentration of PAM solutions. This conclusion is consistent with drag reduction theory.