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README.txt*** Data underlying the research of: Two-dimensional numerical simulations of vortex-induced vibrations for a cylinder in conditions representative of wind turbine towers ***
Authors: Viré A., Derksen A., Folkersma M., and Sarwar K.
Wind Energy Group, Faculty of Aerospace Engineering, Delft University of Technology
Corresponding author: A.C. Viré
Contact Information: a.c.vire@tudelft.nl
Delft University of Technology
Faculty of Aerospace Engineering
2629HS Delft
The Netherlands
*** General Introduction ***
This dataset contains data collected in the framework of the MSc thesis of A. Derksen (May 2019).
It was further analysed and used in the scope of the research paper Viré et al, Wind Energy Science 5, 1-14 (2020), https://doi.org/10.5194/wes-5-1-2020.
Some of the authors were funded by two projects from the European Union’s Horizon 2020 research and innovation programme, namely project STEP4WIND (grant agreement No 860737) and project AWESCO (grant agreement No 642682).
*** Purpose of the simulations ***
The purpose of these numerical simulation was to investigate the occurence of vortex-induced vibrations for wind turbine towers. Here, only two-dimensional simulations were performed.
*** Numerical methodology ***
The data was generated with the open-source code OpenFOAM-v1812 as described in the paper Viré et al, Wind Energy Science 5, 1-14 (2020).
*** Description of the dataset ***
The dataset contains four files. A short description of the data in each file is provided hereafter.
- laminar_freevibration.dat
This file contains the results of flow past a freely-vibrating 2D cylinder for:
Re=150 (Reynolds number)
m^star=2 (reduced mass)
zeta=0.007 (damping coefficient)
The file is structured in 3 columns:
* 1st column shows the non-dimensional reduced velocity
* 2nd column is the non-dimensional maximum motion amplitude
* 3rd column is the non-dimensional ratio of the motion frequency to the natural frequency
- turbulent_stationary.dat
This file contains the results of flow past a stationary 2D cylinder at Re=3.6*10^6.
The file is structured in 2 columns:
* 1st column shows the circumferential angle at a point on the cylinder surface, starting from the stagnation point (in deg).
* 2nd column is either the non-dimensional pressure coefficient (lines 3-150) or the non-dimensional friction coefficient (lines 153-448).
- turbulent_forcedvibration.dat
This file contains the results of flow past a 2D cylinder subjected to forced oscillations in the direction perpendicular to the flow direction.
Results are shown for different values of maximum prescribed motion amplitudes (y^star).
The file is structured in many columns as follows:
* 1st column: non-dimensional ratio St_f/St, where St_f denotes the non-dimensional forcing frequency of the cylinder and St is the Strouhal number associated with flow past a stationary cylinder at the same Reynolds number.
* 2nd column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.0035.
* 3rd column: Aerodynamic damping for y^star=0.0035.
* 4th column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.015.
* 5th column: Aerodynamic damping for y^star=0.015.
* 6th column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.025.
* 7th column: Aerodynamic damping for y^star=0.025.
* 8th column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.05.
* 9th column: Aerodynamic damping for y^star=0.05.
* 10th column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.1.
* 11th column: Aerodynamic damping for y^star=0.1.
* 12th column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.175.
* 13th column: Aerodynamic damping for y^star=0.175.
* 14th column: Root-mean-square of the lift coefficient (non-dimensionalised by its value for a stationary cylinder) for y^star=0.25.
* 15th column: Aerodynamic damping for y^star=0.25.
- turbulent_freevibration.dat
This file contains the results of flow past a 2D cylinder freely vibrating in the direction perpendicular to the flow direction.
Results are shown for m^star=29.6 and zeta=0.003.
The file is structured in 3 columns as follows:
* 1st column: non-dimensional reduced velocity
* 2nd column: non-dimensional maximum motion amplitude
* 3rd column: ratio of the motion frequency to the natural frequency
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