Computational Fluid Dynamic Analysis of a Floating Offshore Wind Turbine Experiencing Platform Pitching Motion

Tran, Thanh Toan; Kim, Dong-Hyun; Song, Junho

doi:10.3390/en7085011

Cited by 102 publications

(78 citation statements)

References 19 publications

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“…a smoother blade thickness distribution and a smoother root/blade transition compared to the initial design). This turbine concept has been widely used [15,16,17]. The tip shape, not included in the reference designs [13,14], is defined as a simple 'rounded' tip and the hub diameter has been increased to 5.4m in this study (to simplify the generation of the structured mesh).…”

Section: Theoretical Modelmentioning

confidence: 99%

Momentum balance in a fully developed boundary layer over a staggered array of NREL 5MW rotors

Delafin

Nishino

2017

J. Phys.: Conf. Ser.

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Section: Theoretical Modelmentioning

confidence: 99%

Momentum balance in a fully developed boundary layer over a staggered array of NREL 5MW rotors

Delafin

Nishino

2017

J. Phys.: Conf. Ser.

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“…It appears from the presented information that the simulations should be high quality and within the limitations of URANS. Tran et al (2014) also compared their results against lower-order simulations using the unsteady blade element momentum method. The Tran et al (2014) implementation of the unsteady blade element moment (UBEM) method was taken from Hansen (2008) with corrections for tip losses, wake unsteadiness and unsteady aerodynamics.…”

Section: Comparison Casesmentioning

confidence: 99%

“…Tran et al (2014) also compared their results against lower-order simulations using the unsteady blade element momentum method. The Tran et al (2014) implementation of the unsteady blade element moment (UBEM) method was taken from Hansen (2008) with corrections for tip losses, wake unsteadiness and unsteady aerodynamics. This particular implementation took the platform motion into account by changing the relative inflow velocity.…”

Section: Comparison Casesmentioning

confidence: 99%

“…Two different papers were used as a basis for comparison, both investigating the NREL 5MW reference turbine (Jonkman, 2013). Tran et al (2014) compare a number of techniques with virtual blade motion using multiple reference frames (CFD-MRF) and real rigid body blade motion (CFD-RBM). The highest-order simulation is a 3-D unsteady Reynolds-averaged Navier-Stokes (URANS) CFD simulation with a k − ω shear-stress transport turbulence model.…”

Section: Comparison Casesmentioning

confidence: 99%

“…In this paper, a comparison is made between the LLFVW code and existing literature comparisons in which higher-order aerodynamic simulation techniques were used, i.e. URANS CFD (Tran et al, 2014;Sebastian and Lackner, 2013). The comparisons and further test cases are made using the NREL 5MW reference turbine undergoing prescribed harmonic motion (see Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modern methods for investigating the stability of a pitching floating platform wind turbine

et al. 2017

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Abstract. The QBlade implementation of the lifting-line free vortex wake (LLFVW) method was tested in conditions analogous to floating platform motion. Comparisons against two independent test cases using a variety of simulation methods show good agreement in thrust forces, rotor power, blade forces and rotor plane induction. Along with the many verifications already undertaken in the literature, it seems that the code performs solidly even in these challenging cases. Further to this, the key steps are presented from a new formulation of the instantaneous aerodynamic thrust damping of a wind turbine rotor. A test case with harmonic platform motion and collective blade pitch is used to demonstrate how combining such tools can lead to a better understanding of aeroelastic stability. A second case demonstrates a non-harmonic blade pitch manoeuvre showing the versatility of the instantaneous damping method.

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Aerodynamic simulations of offshore floating wind turbine in platform-induced pitching motion

Nguyen

2016

Wind Energ.

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Forfloating offshore wind turbines, rotors are under coupled motions of rotating and platform‐induced motions because of hydrodynamics impacts. Notably, the coupled motion of platform pitching and rotor rotating induces unsteadiness and nonlinear aerodynamics in turbine operations; thus having a strong effect on the rotor performances including thrust and power generation. The present work aims at developing a computational fluid dynamics model for simulations of rotor under floating platform induced motions. The rotor motion is realized using arbitrary mesh interface, and wind flows are modelled by incompressible Navier‐Stokes flow solver appended by the k − ω shear stress transport turbulence model to resolve turbulence quantities. In order to investigate the fully coupled motion of floating wind turbine, the six degree of freedom solid body motion solver is extended to couple with multiple motions, especially for the motion of rotor coupled with the prescribed surge‐heave‐pitch motion of floating platform. The detailed methodology of multiple motion coupling is also described and discussed in this work. Both steady and unsteady simulations of offshore floating wind turbine are considered in the present work. The steady aerodynamic simulation of offshore floating wind turbine is implemented by the multiple reference frames approach and for the transient simulation, the rotor motion is realized using arbitrary mesh interface. A rigorous benchmark of the present numerical model is performed by comparing to the reported literatures. The detailed elemental thrust and power comparisons of wind turbine are carried out by comparing with the results from FAST developed by National Renewable Energy Laboratory and various existing numerical data with good agreement. The proposed approach is then applied for simulations of National Renewable Energy Laboratory 5MW turbine in coupled platform motion at various wind speeds under a typical load case scenario. Transient effect of flows over turbines rotor is captured with good prediction of turbine performance as compared with existing data from FAST. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Computational Fluid Dynamic Analysis of a Floating Offshore Wind Turbine Experiencing Platform Pitching Motion

Cited by 102 publications

References 19 publications

Momentum balance in a fully developed boundary layer over a staggered array of NREL 5MW rotors

Momentum balance in a fully developed boundary layer over a staggered array of NREL 5MW rotors

Modern methods for investigating the stability of a pitching floating platform wind turbine

Aerodynamic simulations of offshore floating wind turbine in platform-induced pitching motion

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