Investigation of the validity of BEM for simulation of wind turbines in complex load cases and comparison with experiment and CFD

Rahimi, H.; Dose, B.; Stoevesandt, Bernhard; Peinke, Joachim

doi:10.1088/1742-6596/749/1/012015

Cited by 25 publications

(29 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, increasing the size of the wind turbines poses the question about the accuracy of such simplified simulation models, especially in cases where unsteady 3D flow conditions are expected to be relevant (e.g., blade root and tip portion, shear, and yawed inflow). Several studies show that the codes based on BEM with different correction models for yawed inflow are often not sufficiently accurate and reliable for predicting loads acting on wind turbine blades …”

Section: Introductionmentioning

confidence: 99%

“…In practice, wind turbines in the atmospheric boundary layer operate in fluctuating wind, which easily leads to a misalignment of the velocity vector with respect to the rotor plane. Thus, currently, a major concern regarding BEM tools is the applicability of skewed wake models in the design process of wind turbines . A simplistic approach towards these problems, as is the case when using common BEM tools, can lead to large errors in the design process and reduces the efficiency of the wind turbine .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An engineering model for wind turbines under yawed conditions derived from high fidelity models

et al. 2018

View full text Add to dashboard Cite

This work presents a significantly improved engineering model for the prediction of the loads in yawed flow. The newly developed model focuses on the so‐called skewed wake effect. This effect leads to an azimuthal variation of the axial induction velocity which depends on the yaw angle, tip speed ratio, wind speed, and radial position. The azimuthal variation of the induced velocities leads to a variation in blade loads, which is important for the prediction of fatigue loads and determines the yawing moment which can be stabilizing or destabilizing and is among others important for passively yawed turbines. The paper puts particular emphasis on the contribution of the root vorticity to the azimuthal variation of induced velocity. Current widely used models typically only take into account the skewed wake effect without the contribution of root vorticity, i.e., leading to a significant different radial dependency of the skewed wake effects. The new model is derived from computational fluid dynamics of 3 multimegawatt‐class wind turbines, namely the NREL 5MW and two 10‐MW turbines designed in the EU projects AVATAR and INNWIND.EU. Simulations were performed by means of an actuator line model. The proposed model is validated with results from a fully resolved computational fluid dynamics model, a free vortex wake code and actuator line model simulations for different wind turbines and yaw angles. The obtained results indicate that in many cases, the new model considerably improves the prediction of the azimuthal variation of axial induction factor and the resulting variation in blade loads and consequent yawing moment.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An engineering model for wind turbines under yawed conditions derived from high fidelity models

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Rahimi et al [25] modelled the UAE phase IV turbine in downwind configuration using the Blade Element Momentum (BEM) model for the rotor and a potential flow solution to model the tower. The simulations were performed with the FAST code also developed by NREL.…”

Section: Discussionmentioning

confidence: 99%

Full Downwind Turbine Simulations Using Actuator Line Method

Matiz-Chicacausa

López

2018

Modelling and Simulation in Engineering

View full text Add to dashboard Cite

In the present work the actuator line (AL) technique is proposed to model a complete wind turbine (rotor and tower) in downwind configuration. The case study used is the Unsteady Aerodynamics Experiment (UAE) Phase VI turbine to analyze its suitability in capturing the tower shadow effect. Computational Fluid Dynamics (CFD) simulations were carried out using the open-source code OpenFOAM and the class of horizontal wind turbine AL from the toolbox SOWFA developed by the National Renewable Energy Laboratory (NREL). The objective of the present work is to validate the use of AL model for tower simulations and to establish whether such simplification is valid to capture the effect that tower shadow exerts over the rotor aerodynamics and to verify the accuracy of the proposed model regarding prediction of loads in the rotor. Computations were done first on an isolated rotor modelled with the AL technique; second on a full downwind turbine with AL in both rotor and tower; and, finally, on a 3D rotor with AL tower. Numerical results show good agreement with the experimental data concluding that the AL model is capable of a fast and accurate load prediction under certain conditions.

show abstract

“…Pitch control and fixed pitch mechanisms have also been the subjects of investigations (Boorsma & Schepers, 2016;Farouk & Gawad, 2013;Leroy et al, 2016;Neammanee, Sirisumrannukul, & Chatratana, 2010;Strom, Brunton, & Polagye, 2016;Vijae, 2011). Modified design of wind turbines have also been investigated (Abdulhadi, 2012;Baldacchino et al, 2016;Elfarra, 2011;Lutz & Wagner, 2000;Lynch, 2011;Maniaci et al, 2016;Perfilev, 2013;Rahimi, Hartvelt, Peinke, & Schepers, 2016;Schubel & Crossley, 2012).…”

Section: Output Control and Modified Design In Wind Turbinesmentioning

confidence: 99%

Performances and Stall Delays of Three Dimensional Wind Turbine Blade Plate-Models with Helicopter-Like Propeller Blade Tips

Sutrisno

Deendarlianto

Indarto

et al. 2017

MAS

View full text Add to dashboard Cite

The research on three dimensional (3-D) wind turbine blades has been introduced (Sutrisno, Prajitno, Purnomo, & B.W. Setyawan, 2016). In the current experiment, the 3-D wind turbine blades would be fitted with helicopter-like blade tips and additional fins to the blade hubs to demonstrate some laminarizing features.It was found that additional helicopter-like blade tip to the turbine blade creates strong laminar flows over the surface of the blade tips. Supplementary, finned hub, fitted to the blade body, creates rolled-up vortex flows, weakens the blade stall growth development, especially for blades at high-speed wind. A proposed mathematical form of modified lifting line model has been developed to pursue further 3-d blade development study of 3-d wind turbine blade.Rolled up vortex effects, developed by finned of the base hub, has been acknowledged could demolish the turbulent region, as well as laminarize the stall domain to intensify the induced wind turbine blade lift.

show abstract

Investigation of the validity of BEM for simulation of wind turbines in complex load cases and comparison with experiment and CFD

Cited by 25 publications

References 4 publications

An engineering model for wind turbines under yawed conditions derived from high fidelity models

An engineering model for wind turbines under yawed conditions derived from high fidelity models

Full Downwind Turbine Simulations Using Actuator Line Method

Performances and Stall Delays of Three Dimensional Wind Turbine Blade Plate-Models with Helicopter-Like Propeller Blade Tips

Contact Info

Product

Resources

About