针对旋转封闭圆柱空腔内的轴对称涡破裂现象 ,设计了可变旋转 Re实验系统 .实验中空腔高径比 H/R=1 .78.采用激光相位多普勒测量技术 ( Phase Doppler Anemometer,PDA)测量了圆柱空腔轴线上轴向速度分量分布随 Re变化的情况 ,定量观测和分析了涡破裂现象的发生、发展过程 ,测量到涡破裂现象出现和消失这两种临界状态 .涡破裂现象出现的 Re区域和 Escudier的流动可视化实验结果很吻合 .同时测量了子午面上的二维流动整场以及涡破裂区域的流动细节 . Aiming at the phenomenon of axisymmetric vortex rupture in a rotating closed cylindrical cavity, a variable rotation Re system was designed. The aspect ratio of the cavity in the experiment was Hf = 1.78. By using the phase Doppler Anemometer PDA), the distribution of axial velocity component along the axis of cylindrical cavity was measured, and the occurrence and development of vortex rupture were quantitatively observed and analyzed. The critical states of vortex rupture and disappearance were measured. The phenomenon of Re region agrees well with the experimental results of Escudier’s flow visualization, and the details of the two-dimensional flow over the meridional surface and the flow in the vortex rupture area are also measured.