Mapping vortex-induced forces of oscillating bluff bodies from subcritical to critical Reynolds numbers

作者：Haojie Ren, Shixiao Fu, Mengmeng Zhang, Yuwang Xu · 发表于：Physical Review Fluids · 年份：2024 · DOI：10.1103/physrevfluids.9.l092701 · 被引用次数：7 · 研究领域：Fluid Dynamics and Vibration Analysis、Wind and Air Flow Studies、Fluid Dynamics and Turbulent Flows

We experimentally investigate vortex-induced forces of an oscillating bluff body across subcritical to critical Reynolds number (Re) regimes, and reveal hydrodynamic component variations versus Re, thereby addressing a gap in understanding at high Re. Specifically, the drag crisis cannot be mitigated by vibration, the excitation force is sensitive to both Re and vibration parameters, and the added mass coefficient sensitivity to vibration decreases at high Re. The maximum vortex-induced-vibration (VIV) amplitude can reach 3.0 times the diameter. We confirm that current prediction theory at lower Re are not applicable to the full-scale one, underscoring the effect of Re on hydrodynamic inputs.