采用数字粒子图象测速技术 ,在恒定来流的工况下 ,分别对圆柱、正弦形状半岛的尾流近区的速度分布进行了比较详细的测量 ,获得了大量的数据。从相似性的角度 ,对流速在尾流摆动一个周期内的平均值进行了分析。结果显示 ,沿程各断面的此种平均流速在归一化后具有一定程度的相似性 ,而各断面归一化紊动参数分布的差别很大。 Using digital particle image velocimetry, a detailed measurement of the velocity distribution in the vicinity of the wake of a circular cylinder and a sinusoidal peninsula under a constant flow condition has been carried out. A great deal of data have been obtained. From the similarity point of view, the mean value of the flow velocity in one cycle of wake wobble is analyzed. The results show that the average velocities of each section along the process have a certain degree of similarity after normalization, and the distribution of normalized turbulence parameters varies greatly in each section.