中文摘要：

试验性的大小用解决时间的粒子图象 velocimetry (TRPIV ) 被执行在聚合物添加剂答案的围住墙的骚乱调查协调结构的空间拓扑的字符。有或没有在一样的雷纳兹数字的聚合物添加剂的充分发达的近墙的狂暴的流动领域被 TRPIV 在一条水隧道测量。狂暴的统计的比较证实由于长链的聚合物的粘弹性的结构，墙正常速度变化和雷纳兹砍在近墙的区域的应力显著地被压制。而且，聚合物的如此的行为是，这被注意仔细与运动的死亡有关第二并且向前象限，即，喷射并且打扫事件，在近墙的区域。协调结构的空间拓扑的模式被新亩级的标准基于局部地平均的速度结构功能在爆炸期间提取了。尽管协调结构的一般形状由聚合物添加剂是未改变的，波动的速度，速度坡度，速度种类率和在爆炸事件期间的协调结构的涡度在水里与那相比在聚合物添加剂答案被压制。结果证明由于聚合物添加剂，协调结构的出现和紧张被压制，导致拖减小。

英文摘要：

An experimental measurement was performed us- ing time-resolved particle image velocimetry （TRPIV） to in- vestigate the spatial topological character of coherent struc- tures in wall-bounded turbulence of polymer additive solu- tion. The fully developed near-wall turbulent flow fields with and without polymer additives at the same Reynolds number were measured by TRPIV in a water channel. The compar- isons of turbulent statistics confirm that due to viscoelastic structure of long-chain polymers, the wall-normal velocity fluctuation and Reynolds shear stress in the near-wall region are suppressed significantly. Furthermore, it is noted that such a behavior of polymers is closely related to the decease of the motion of the second and forth quadrants, i.e., the ejection and sweep events, in the near-wall region. The spa- tial topological mode of coherent structures during bursts has been extracted by the new mu-level criteria based on locally averaged velocity structure function. Although the general shapes of coherent structures are unchanged by polymer additives, the fluctuating velocity, velocity gradient, velocity strain rate and vorticity of coherent structures during burst events are suppressed in the polymer additive solution com- pared with that in water. The results show that due to the polymer additives the occurrence and intensity of coherent structures are suppressed, leading to drag reduction.