Abstract
As the maximum speed of high-speed trains increases, flow-induced vibration of the trains in tunnels has become a subject of discussion in Japan. A basic study of flow controls using jets were conducted to reduce unsteady aerodynamic forces acting on the trains in the tunnels. We performed a wind tunnel experiment with a model train equipped with unsteady jet devices to estimate the effect of the jets. The wind tunnel experiment showed the effectiveness of the feedback control for the jets. We also conducted a numerical simulation to investigate a mechanism of the reduction of the unsteady aerodynamic force by the jets.
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