图4. 一个典型周期内绕原始水翼空化脱落的侧视视角 (上: 实验结果, 下: 数值结果; $\sigma=0.83$, $\alpha=8^\circ$, $Re=5.07\times10^5$)
Fig.4. Side view of cavity shedding pattern for $\sigma=0.83$, $\alpha=8^\circ$, $Re=5.07\times10^5$ during a typical cycle (up: experimental results, down: numerical results)