Abstract In this work, a pair of synthetic jets are investigated for control of vortex induced vibration (VIV) of a circular cylinder in uniform flow in the low Reynolds number regime. In particular, the study focuses on three representative phase differences (0, π/2, and π) between the pair of synthetic jets to study the influence of synthetic jet excitation frequency ratio f s j * ( f s j * = fsj/fn,water) on 2DOF VIVs control by two-dimensional numerical simulation. The Reynolds number is fixed at 150, the mass ratio m* (m* = mosc/md) of the circular cylinder is 2.0, and the natural oscillation frequencies in the in-flow and cross-flow directions are equal. The amplitude response, frequency response, hydrodynamic forces, and wake patterns are analyzed. The results show that both in-flow and cross-flow oscillations of the circular cylinder can be significantly suppressed by synthetic jets with various phase differences, and the wake becomes symmetric when f s j * ≥ 4.0. When f s j * f s j * = 0.2.

中文翻译：

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不同激发频率下合成射流对圆柱体二自由度涡激振动抑制的数值研究

摘要 在这项工作中，研究了一对合成射流，用于控制低雷诺数状态下均匀流动的圆柱体的涡激振动 (VIV)。特别地，研究重点研究了合成射流对之间三个具有代表性的相位差（0、π/2 和 π），研究了合成射流激发频率比 fsj * ( fsj * = fsj/fn,water) 对2DOF VIV 由二维数值模拟控制。雷诺数固定为150，圆柱体的质量比m*（m*=mosc/md）为2.0，流入和错流方向的固有振荡频率相等。分析了振幅响应、频率响应、水动力和尾流模式。结果表明，不同相位差的合成射流可以显着抑制圆柱体的流入和横流振荡，并且当 fsj * ≥ 4.0 时，尾流变得对称。当 fsj * fsj * = 0.2。