Self-issuing jet control for suppression of vortex-induced vibrations of a single box girder at low Sc

Abstract

In this study, an experimental investigation was conducted to investigate the control effect of self-issuing jets — positioned on the lower inclined panels of a bridge deck — on suppression of vertical vortex-induced vibrations (VIVs). Two cases were considered, i.e., decks with and without auxiliary attachments (handrails and maintenance rails), corresponding to the serviceability and construction period, respectively. The vertical oscillating response, surface pressures, and aerodynamic forces are considered to reveal the control mechanism of self-issuing jets on the flow field around the section model. The results demonstrate that the self-issuing jet method effectively suppresses the VIV of the streamlined deck under an angle range of attack of -5 – 5° by reducing the fluctuating surface pressure and vortex-excited lift. For the bridge deck with attachments, no VIV is observed under the effect of self-issuing jets, indicating that this method can also fully suppress the VIV excited by the motion-induced vortex.