Summary of the Delft University Wind Turbine Dedicated Airfoils

Timmer, W.A.; Rooij, R. P. J. O. M. van

doi:10.1115/1.1626129

Cited by 352 publications

(154 citation statements)

References 2 publications

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“…The classification shows the geometric profile of a NACA aerofoil where the 1st digit refers to maximum chamber to chord ratio, 2nd digit is the camber position in tenths of the chord and the 3rd & 4th digits are the maximum thickness to chord ratio in percent [24]. The emergence of wind turbine specific aerofoils such as the Delft University [23], LS, SERI-NREL and FFA [6] and RISO [26] now provide alternatives specifically tailored to the needs of the wind turbine industry.…”

Section: Aerodynamicsmentioning

confidence: 99%

“…The co-efficient for the lift and drag of aerofoils is difficult to predict mathematically, although freely available software, such as XFOIL [21] model results accurately with the exception of post stall, excessive angles of attack and aerofoil thickness conditions [22,23]. Traditionally aerofoils are tested experimentally with tables correlating lift and drag at given angles of attack and Reynolds numbers [24].…”

Section: Aerodynamicsmentioning

confidence: 99%

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Wind Turbine Blade Design

Schubel¹,

Crossley²

2014

Wind Turbine Technology

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A detailed review of the current state-of-art for wind turbine blade design is presented, including theoretical maximum efficiency, propulsion, practical efficiency, HAWT blade design, and blade loads. The review provides a complete picture of wind turbine blade design and shows the dominance of modern turbines almost exclusive use of horizontal axis rotors. The aerodynamic design principles for a modern wind turbine blade are detailed, including blade plan shape/quantity, aerofoil selection and optimal attack angles. A detailed review of design loads on wind turbine blades is offered, describing aerodynamic, gravitational, centrifugal, gyroscopic and operational conditions.

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Section: Aerodynamicsmentioning

confidence: 99%

Section: Aerodynamicsmentioning

confidence: 99%

Wind Turbine Blade Design

Schubel¹,

Crossley²

2014

Wind Turbine Technology

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“…A comparison between experimental data provided by Delft University of Technology (DUT) [15] and numerical results is done. The numerical values have been obtained using both, the fine (19 × 10 6 CV) and the coarse (3.9 × 10 6 CV) meshes.…”

Section: The Du-93-w-210 Case Resultsmentioning

confidence: 99%

A dynamic wall model for Large-Eddy simulations of wind turbine dedicated airfoils

Calafell¹,

Lehmkuhl²,

Carmona³

et al. 2014

J. Phys.: Conf. Ser.

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Abstract. This work aims at modelling the flow behavior past a wind turbine dedicated airfoil at high Reynolds number and large angle of attack (AoA). The DU-93-W-210 airfoil has been selected. To do this, Large Eddy Simulations (LES) have been performed. Momentum equations have been solved with a parallel unstructured symmetry preserving formulation while the wall-adapting local-eddy viscosity model within a variational multi-scale framework (VMS-WALE) is used as the subgrid-scales model. Since LES calculations are still very expensive at high Reynolds Number, specially at the near-wall region, a dynamic wall model has been implemented in order to overcome this limitation. The model has been validated with a very unresolved Channel Flow case at Reτ = 2000. Afterwards, the model is also tested with the Ahmed Car case, that from the flow physics point of view is more similar to an stalled airfoil than the Channel Flow is, including flow features as boundary layer detachment and recirculations. This case has been selected because experimental results of mean velocity profiles are available. Finally, a flow around a DU-93-W-210 airfoil is computed at Re = 3 × 10 6 and with an AoA of 15• . Numerical results are presented in comparison with Direct Numerical Simulation (DNS) or experimental data for all cases.

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“…The DU97-Flatback airfoil, a flatback version of the TU-Delft DU97-W-300 airfoil [24], is employed in the present study as the baseline blunt trailing edge airfoil, as shown in Figure 1 with a blue dashed line. The DU97-Flatback airfoil is created by adding thickness symmetrically to the aft 60% of the DU97-W-300 airfoil, giving a blunt trailing edge with a thickness of 10% chord.…”

Section: Description Of CC Airfoil Configurationsmentioning

confidence: 99%

Flow Control over the Blunt Trailing Edge of Wind Turbine Airfoils Using Circulation Control

Dong

Qiao

et al. 2018

Energies

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Abstract:A new partial circulation control (PCC) method is implemented on the blunt trailing edge DU97-Flatback airfoil, and compared with the traditional full circulation control (FCC) based on numerical analysis. When the Coanda jet is deactivated, PCC has an attractive advantage over FCC, since the design of PCC doesn't degrade aerodynamic characteristics of the baseline flatback section, in contrast to FCC, which is important in practical use in case of failure of the circulation control system. When the Coanda jet is activated, PCC also outperforms FCC in several respects. PCC can produce much higher lift coefficients than FCC over the entire range of angles of attack as well as the entire range of jet momentum coefficients under investigation, but with slightly higher drag coefficients. The flow field of PCC is less complex than that of FCC, indicating less energy dissipation in the main flow and hence less power expenditure for the Coanda jet. The aerodynamic figure of merit (AFM) and control efficiency for circulation control are defined, and results show that PCC has much higher AFM and control efficiency than FCC. It is demonstrated that PCC outperforms FCC in terms of effectiveness, efficiency and reliability for flow control in the blunt trailing edge wind turbine application.

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Summary of the Delft University Wind Turbine Dedicated Airfoils

Cited by 352 publications

References 2 publications

Wind Turbine Blade Design

Wind Turbine Blade Design

A dynamic wall model for Large-Eddy simulations of wind turbine dedicated airfoils

Flow Control over the Blunt Trailing Edge of Wind Turbine Airfoils Using Circulation Control

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