The location of vortex breakdown was recorded using phase locked photography technique.
流动显示图形采用相位锁定照相记录。
Before the vortex breakdown, the aeroelastic instability presents itself as just a simple flutter.
涡破裂前，气动弹性失稳表现为单纯的颤振问题。
Spectrum analysis reveals the frequency characteristics of vortex breakdown point oscillation and spiral wave.
频谱分析确定了破裂点脉动和螺旋波的频率特征。
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