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图5. 不同雷诺数条件下的波速比$v_{cur}/v_{act}$ 随无量纲参数 $\omega/\omega_0$的变化关系. 阴影区域表示根据Williams等[5]的实验结果计算的波速比的区域($0.69\pm 0.09$)

Fig. 5. The speed ratio $v_{cur}/v_{act}$ in relation to dimensionless frequency $\omega/\omega_0$ under different $Re$. Shaded area represents the speed ratio ($0.69\pm 0.09$) calculated from experiment (Williams et al[5])