Prediction of vortex shedding suppression from circular cylinders at high Reynolds number using base splitter plates

Dai, Shaoshi; Younis, Bassam A.; Zhang, Hongyang; Guo, Chunyu

doi:10.1016/j.jweia.2018.09.006

Cited by 13 publications

(6 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dai et al did numerical simulation on different lengths of partition plates to study their effect on three-dimensional fixed cylindrical partition plate system at high Reynolds number. The research shows that the ratio of the length 𝐿 of the divider plate to the diameter 𝐷 of the cylinder is the key parameter for the divider plate control technology to suppress the vortex shedding and thus the unstable flow field force on the cylinder [8].…”

Section: Resultsmentioning

confidence: 99%

Analysis of flow-induced vibration of cylinder with splitter plate based on overset grid method

Ding¹,

Cui-xiang²

2022

Vib. proced.

View full text Add to dashboard Cite

In actual engineering, asymmetric flow often occurs, but rigid partitions are often installed in the direction of the flow field and are symmetric in the flow direction. This will result in a deflection angle between the dividing plate and the direction of the incoming flow. The research results show that when the declination angle is low, the partition plate has a limited impact on the system; when the deflection angle is about 10 degrees, the system vibration characteristics will have abrupt changes, the amplitude will decrease, and the vortex frequency will increase; at the deflection angle 10 degrees to 45 degrees As the declination angle increases, the amplitude increases, and the vortex frequency decreases; it can be seen from the motion trajectory that the declination angle changes suddenly after 10 degrees, and the system has a small amplitude between 10 degrees and 25 degrees. That is, in this declination interval, the partition plate has a better control effect on the vibration of the cylindrical system.

show abstract

Section: Resultsmentioning

confidence: 99%

Analysis of flow-induced vibration of cylinder with splitter plate based on overset grid method

Ding¹,

Cui-xiang²

2022

Vib. proced.

View full text Add to dashboard Cite

show abstract

“…Nevertheless, this is only possible if objective functions behave like continuous functions through the design space. Unfortunately, the experiment results can describe some discontinuities because of an instantaneous zero-lift condition when the aerodynamic surface gets closer to the pole since it can break the vortex dynamics, a phenomenon known as vortex shedding suppression, reported by the authors of [36,37].…”

Section: Surrogate Model and Vortex Shedding Suppressionmentioning

confidence: 98%

Assessment of Aerodynamic Plates Subjected to Von Kármán Vortex Street for Enhancing the Wind Energy Generation in Blade-Less Devices

Zuluaga,

Ricardo,

Oostra

et al. 2023

Resources

View full text Add to dashboard Cite

This study explores the feasibility of using an oscillating plate downstream of a cylindrical body to produce mechanical energy from a Von Kármán vortex street under sub-critical flow conditions (Re = 72,500). The study aims to quantify the impact of the plate length, its separation from the cylinder, and a machine damping factor on the power coefficient and the blade’s displacement to identify the optimal configuration. This preliminary assessment assumes that the plate oscillation is small enough to avoid changes in the vortex dynamics. This assumption allows the construction of a surrogate model using Computational Fluid Dynamics (CFD) to evaluate the effect of plate length and separation from the cylinder on the fluctuating lift forces over the plate. Later, the surrogate model, combined with varying machine damping factors, facilitates the description of the device’s dynamics through the numerical integration of an angular momentum equation. The results showed that a plate with a length of 0.52D, a separation of 5.548D from the cylinder, and a damping factor of 0.013 achieved a power coefficient of 0.147 and a perpendicular displacement of 0.226D. These results demonstrate a substantial improvement in the performance of blade-less generators.

show abstract

“…( 5)]. Alternatively, a constant ratio ν t =ν is specified and ϵ is then deduced from that value (Dai et al 2018;Jones et al 2016). In this study, consideration was given to using a Reynolds number-dependent approach to specifying ν t =ν.…”

Section: Computational Detailsmentioning

confidence: 99%

“…Their results will provide useful benchmarks for checking the present computations. Another passive technique with proven performance that is considered here involves the use of a splitter plate installed at the rear of the cross-sectional area (Dai et al 2018). While rounding the corners and adding a splitter plate have proved to be quite effective when deployed separately, no previous work could be found to show their performance when deployed simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Hydrodynamic Loads on a Full-Scale Caisson at High Reynolds Number

Niu

Younis

2023

J. Struct. Eng.

Self Cite

View full text Add to dashboard Cite

The paper reports on the computation of the hydrodynamic loads on a full-scale caisson at high Reynolds number in the presence of vortex shedding. The objective was to obtain reliable predictions of the resulting mean and fluctuating forces to guide the design of an actual caisson in the absence of relevant experimental data. A further objective was to investigate the effectiveness of alternative methods for the control of vortex shedding that can be implemented in practice. Two such methods were evaluated: (1) by rounding the corners of the rectangular-sectioned caisson, and (2) by the placement of a splitter plate in the separated wake region. The computations, which were performed using the OpenFOAM open-source software, were for a fixed caisson and hence did not account for motions due to vortex-induced vibrations. The effects of turbulence were accounted for by performing large-eddy simulations, and by using two-equation eddy-viscosity closures, one of which was specifically adapted to account for the interactions between the periodic vortex shedding and the random turbulence. The numerical accuracy was checked using the grid convergence index method, and the computations were extensively validated against data from relevant benchmark flows. The recommendations of this research were implemented in the design of a full-scale caisson that has since been deployed in a bridge construction project.

show abstract

Prediction of vortex shedding suppression from circular cylinders at high Reynolds number using base splitter plates

Cited by 13 publications

References 31 publications

Analysis of flow-induced vibration of cylinder with splitter plate based on overset grid method

Analysis of flow-induced vibration of cylinder with splitter plate based on overset grid method

Assessment of Aerodynamic Plates Subjected to Von Kármán Vortex Street for Enhancing the Wind Energy Generation in Blade-Less Devices

Prediction of the Hydrodynamic Loads on a Full-Scale Caisson at High Reynolds Number

Contact Info

Product

Resources

About