Passive VIV Reduction of An Inclined Flexible Cylinder by Means of Helical Strakes with Round-Section

Xu, Wanhai; Qin, Wenqi; He, Ming; Gao, Xifeng

doi:10.1007/s13344-018-0043-8

Cited by 12 publications

(1 citation statement)

References 17 publications

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“…There are some other measures, which also sufficiently mitigate the VIV, need to change the entire length of the cylinder, such as Bach-type blades (Zhu et al 2019), groove strips (Wang et al 2019) and control rods (Lu et al 2019). Similar to helical strakes (Xu et al 2018, Chen et al 2019, Takeshi and Tian 2020, surface control bumps (Owen and Bearman 2001), bionic surface inspired by giant arctus (Marcollo et al 2018, Wang et al 2020, plasma actuators (Hebrero et al 2020) and wavy cylinders (Lam andLin 2009, Zou and are also effective on drag reduction and VIV mitigation. In Owen's study, the drag reductions up to 47% were recorded for a circular cross-sectional body with a wavy axis.…”

Section: Introductionmentioning

confidence: 99%

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

Zhang

et al. 2020

Fluid Dyn. Res.

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A novel aerodynamic measure, an arch mounted leeward of a circular cylinder, is proposed to reduce drag and mitigate vortex shedding for a circular cylinder. To confirm the validity of the proposed measure, the aerodynamic forces were measured through a force meter at the end of a cylinder, the wind pressure was measured at seven cross-sections of the cylinder, and elastically mounted cylinders were also tested. The results show that the arch significantly reduces drag and fluctuating lift by mitigating the vortex shedding in the subcritical Reynolds number range when the proper central angle is selected for the arch. The arch creates a higher base pressure at the leeward side and induces a pressure exchange and spanwise axial flow. This influence is extended along the length of the cylinder by the axial flow due to the strong correlation in the wake in the subcritical regime. Therefore, the arch lowers the base pressure and disrupts the formation of vortex shedding.

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Section: Introductionmentioning

confidence: 99%

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

Zhang

et al. 2020

Fluid Dyn. Res.

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Application of Helical Strakes for Suppressing the Flow-Induced Vibration of Two Side-by-Side Long Flexible Cylinders

Yang

et al. 2020

China Ocean Eng

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Passive Control of Flow-Induced Vibration (FIV) by Helical Strakes for Two Staggered Flexible Cylinders

Wang

Qin

et al. 2021

China Ocean Eng

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Passive VIV Reduction of An Inclined Flexible Cylinder by Means of Helical Strakes with Round-Section

Cited by 12 publications

References 17 publications

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

A novel drag reduction and vortex shedding mitigation measure for a circular cylinder in the subcritical regime

Application of Helical Strakes for Suppressing the Flow-Induced Vibration of Two Side-by-Side Long Flexible Cylinders

Passive Control of Flow-Induced Vibration (FIV) by Helical Strakes for Two Staggered Flexible Cylinders

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