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Figure 4


Fig. 4. Comparison of the measurements of unsteady coefficients of lift (red) and drag (blue) with the cross-flow vortex model. The steady measurements are also included. Tow speed is 1.34 m s–1. Motion parameters are {phi}0=30°, {theta}0=15°, f=1.25 Hz, U{infty}=1.34 m s–1, span=20 cm, {theta}Bias=0°, St=0.26. St is Strouhal number defined as 2f{phi}0Ravg/U{infty}, where f is the frequency of oscillation.





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