Unsteady loads for coaxial rotors in forward flight computed using a vortex particle method [PDF]
, 2018 Recent advances in coaxial rotor design have shown benefits of this configuration. Nevertheless, issues related to rotor-head drag, aerodynamic performance, wake interference, and vibration should also be considered.
Barakos, George +2 more
core +1 more source
Journal of Marine Science and Engineering, 2023 This study investigated vortex-induced vibrations of marine risers in Ocean Thermal Energy Conversion systems. Flume experiments were conducted under two conditions: Condition 1 was with a fixed riser bottom, and Condition 2 was with a fixed bottom on a ...
Qiurui Cai +6 more
doaj +1 more source
Lock-in of the vortex-induced vibrations of a long tensioned beam in shear flow [PDF]
, 2011 The occurrence of lock-in, defined as the local synchronization between the vortex shedding frequency and the cross-flow structural vibration frequency, is investigated in the case of a tensioned beam of length to diameter ratio 200, free to move in both
Bourguet, Rémi +2 more
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Numerical Investigation of Vortex-Induced Vibrations of a Rotating Cylinder near a Plane Wall
Journal of Marine Science and Engineering, 2023 Numerical simulations are carried out to investigate the vortex-induced vibrations of a two-degree-of-freedom (2DOF) near-wall rotating cylinder. Considering the effects of gap ratio, reduced velocity and rotational rate, the amplitude response, wake ...
Ran Li +6 more
doaj +1 more source
Modelling of coupled cross-flow/in-line vortex-induced vibrations using double Duffing and van der Pol oscillators [PDF]
, 2012 Many studies have typically applied a linear structural spring–mass–damper oscillator and a van der Pol wake oscillator to model a one-dimensional cross-flow vortex-induced vibration (VIV).
Srinil, Narakorn, Zanganeh, Hossein
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Vortex-induced vibrations of a cylinder with tripping wires [PDF]
Journal of Fluid Mechanics, 2001 Thin wires are attached on the outer surface and parallel to the axis of a smooth circular cylinder in a steady cross-stream, modelling the effect of protrusions and attachments. The impact of the wires on wake properties, and vortex-induced loads and vibration are studied at Reynolds numbers up to 4.6 × 104, with 3.0 × 104 as a focus point. For a
Hover, F.S. +2 more
openaire +1 more source
Multi-frequency vortex-induced vibrations of a long tensioned beam in linear and exponential shear flows [PDF]
, 2013 The multi-frequency vortex-induced vibrations of a cylindrical tensioned beam of aspect ratio 200, free to move in the in-line and cross-flow directions within first a linearly and then an exponentially sheared current are investigated by means of direct
Bourguet, Rémi +2 more
core +2 more sources
Shock and Vibration, 2015 Although not always resulting in catastrophic failures, vortex-induced vibration (VIV) response can seriously impact the fatigue life and functionality of bridges, especially for separate pairs of box girders in cable-stayed bridges.
Han Xin He, Jia Wu Li
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Bifurcation and dynamic response analysis of rotating blade excited by upstream vortices [PDF]
, 2016 Acknowledgements The authors acknowledge the projects supported by the National Basic Research Program of China (973 Project)(No. 2015CB057405) and the National Natural Science Foundation of China (No. 11372082) and the State Scholarship Fund of CSC.
Cao, Qingjie +3 more
core +1 more source
Distributed lock-in drives broadband vortex-induced vibrations of a long flexible cylinder in shear flow [PDF]
, 2013 A slender flexible body immersed in sheared cross-flow may exhibit vortex-induced vibrations (VIVs) involving a wide range of excited frequencies and structural wavenumbers.
Bourguet, Rémi +2 more
core +2 more sources