添加聚合物对混合层流场特性影响的实验研究

Experimental Research for the Influence of Polymer Additives on the Characteristics of Mixing Layer Flow

叙述了适用于粘弹性流体混合层流场的实验装置的设计和研制．采用二维激光多普勒系统对混合层流场进行了测量，得到了平均速度剖面、动量厚度、湍流脉动强度、雷诺应力等一些流场的基本特征量．结果表明，混合层中加入聚合物后流场将有较大的变化，同时也说明本文所研制的实验装置满足实验的要求．

An experimental apparatus for researching the mixing layer of viscoelastic liquids is designed and built. Some flow characteristics, such as mean velocity, momentum thickness,turbulent intensity and Reynolds’stresses, are measured by using a 2D LDA system. The results show that the development of mixing layer is strongly influenced by polymer additives.