中文摘要：

该文采用DPIV粒子成像测速系统对绕2D超空化水翼（Tulin翼）的空化流场进行了测量，研究了初生空化阶段，附着型片状空化阶段，空化云以及超空化四个阶段典型流场的速度分布及涡量分布。实验结果表明：在空化发展的四个阶段，相对于主流区域，空化流区域速度明显偏小；在整个流动区域，有两个速度梯度较大的区域，一个是空化区和水体主流区的交界面，一个是翼形表面的边界层区域。在空化发展的四个阶段邻近翼型尾部处均会产生一个大小近似相等的正向涡和一个反向涡，并且正向涡总是处于反向涡的下方，形成一组正向对涡。

英文摘要：

The flow field around a 2D supercavitating hydrofoil （Tulin profile） was measured by using digital particle image velocimetry （DPIV）. The measurements were carried out at four stages of cavitation： inception stage, attached sheet cavitation, cloud cavitation and supercavitation. The velocity and vortices distribution have been studied in a detail manner. It shows that the velocity inside the cavitation region is smaller than that of main flow area. Large velocity gradient is observed in the inner layer near the foil surface and near the interface between the main flow and the cavitation flow. At every stage of the cavitating flow, there are a positive vortex and a negative vortex which are almost equal in strength and locate near the trailing edge of the foil, and the positive vortex is above the negative vortex.