Investigation of wake-induced vibration interference between two staggered wave-cone cylinders at subcritical Reynolds number

IF 2.5 3区工程技术

Journal of Hydrodynamics Pub Date : 2024-06-14 DOI:10.1007/s42241-024-0028-4

Lin Zou, Di-wei Liu, Jian Liu, Hong-cheng Zuo, Yin-huan Zheng, Hao Xia

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引用次数: 0

Abstract

The wake induced vibration (WIV) of a one- and two-degree-of-freedom (1DOF, 2DOF) downstream wave-cone cylinder (WCC) behind a stationary equal-size upstream wave-cone cylinder in the staggered arrangement is numerically investigated at subcritical Reynolds number of 3 900 by using shear stressed transfer (SST) k - ω turbulence model. The streamwise pitch ratios (P / D_m) vary from 4 to 6 with a fixed incident angle α = 8°. Experimental measurements were also performed for the validation of the present numerical models. It is found that the largest vibration amplitude in crossflow direction occurred at P / D_m = 4, U_r =8 with small difference of streamwise vibration at P / D_m = 4, 6. Different from single wavy-cone cylinder (SWCC), the downstream flexible one of a pair staggered WCCs got larger vibration amplitude during phase switching stage instead of in-phase stage. The upstream wake will suppress the triple frequency of main frequency in the power spectra density (PSD) functions of Cl but stimulate the double one of that. An intriguing vibration mechanism happened in all 2DOF cases where the trajectory of downstream WCC is a significant ellipse rather than a figure of 8. The transformation of phase switching and the variation of the main frequency of drag coefficient (Cd) can be explained by the vortex-shedding modes of downstream WCC

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亚临界雷诺数下两个交错波锥筒之间的尾流诱导振动干扰研究

采用剪应力传递（SST）k - ω 湍流模型，在亚临界雷诺数 3 900 条件下对交错布置的静止等尺寸上游波锥体后面的一自由度和二自由度（1DOF、2DOF）下游波锥体（WCC）的尾流诱导振动（WIV）进行了数值研究。流向俯仰比 (P / Dm) 在 4 到 6 之间变化，固定入射角 α = 8°。为验证本数值模型，还进行了实验测量。结果发现，在 P / Dm = 4、Ur = 8 时，横流方向的振动幅度最大，而在 P / Dm = 4、6 时，流向振动的差异较小。与单个波状圆锥筒（SWCC）不同，一对交错波状圆锥筒中的下游柔性圆锥筒在相位切换阶段而非同相阶段的振动幅度更大。在 Cl 的功率谱密度（PSD）函数中，上游唤醒会抑制主频的三倍频率，但会刺激主频的两倍频率。所有 2DOF 情况下都出现了一个有趣的振动机制，即下游 WCC 的轨迹是一个明显的椭圆，而不是 8 字形。相位切换的转变和阻力系数（Cd）主频的变化可以用下游 WCC 的涡流曳引模式来解释

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来源期刊

Journal of Hydrodynamics MECHANICS-

自引率

12.00%

发文量

2374

审稿时长

4.6 months

期刊介绍： Journal of Hydrodynamics is devoted to the publication of original theoretical, computational and experimental contributions to the all aspects of hydrodynamics. It covers advances in the naval architecture and ocean engineering, marine and ocean engineering, environmental engineering, water conservancy and hydropower engineering, energy exploration, chemical engineering, biological and biomedical engineering etc.