中文摘要：

本文对不同工况下氯化十六烷基三甲基季铵盐（Cetyltrimethyl Ammonium Chloride，简称CTAC）减阻流体二维流道速度场进行了实验测量，分析了倾斜因子及平坦因子等湍流高阶矩的分布特征。实验结果表明：CTAC溶液流动主流区的倾斜因子远离零值，速度概率密度函数偏离高斯分布远，各向异性强，且平坦因子较大，存在拟序结构，主要是脉动频率低、湍流能量小的大涡结构；近壁面的过渡层区倾斜因子偏离零值不远，各向异性小；过渡区存在强烈的湍流混合。

英文摘要：

Velocity distribution of CTAC drag reducing flow in two- dimensional channel under different experimental situations was measured. The skewness factor and flatness factor described the characteristics of CTAC turbulent flow were analyzed. It is found that the drag reducing flow is more anisotropic in the main flow. There are many quasi - ordering structures in the turbulent flow. Big eddies exist in the main flow, the fluctuating fre- quencies are lower and the values of flatness factor are bigger. The absolute value of skewness factor in the wall region is not large and the flow is more isotropic. There is high- intensity turbulent area in the transition layer.