A Modified Dynamic Stall Model for Low Mach Numbers

Sheng, Wanan; Galbraith, R.A.McD.; Coton, F. N.

doi:10.2514/6.2007-626

Cited by 27 publications

(49 citation statements)

References 15 publications

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“…In the past more sophisticated dynamic stall models have been put forward, such as [31], however, it is worth investigating how to implement and integrate dynamic stall modelling in global simulation of HAWT aerodynamics. In yawed operation, the reduced frequency an airfoil section is working at is usually estimated using the 1P as excitation source.…”

Section: Discussionmentioning

confidence: 99%

“…Consequentially, some of the dynamic stall models mentioned above were adapted to wind turbine environment (such as ONERA method [25]). Specific dynamic stall engineering models "tuned" for wind turbines have been developed, namely Øye [28], Larsen-Nielsen-Krenk [29], ECN Model [30] and Sheng-Galbraith-Coton [31].…”

Section: Modelling Dynamic Stall For Wind Turbinesmentioning

confidence: 99%

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Validation of the Beddoes-Leishman Dynamic Stall Model for Horizontal Axis Wind Turbines using MEXICO data

Pereira

Schepers²,

Pavel

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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The aim of this study is to assess the load predicting capability of a classical BeddoesLeishman dynamic stall model in a horizontal axis wind turbine (HAWT) environment, in the presence of yaw-misalignment. The dynamic stall model was tailored to the HAWT environment, and validated against unsteady thick airfoil data. Subsequently, the dynamic stall model was implemented in a blade element-momentum (BEM) code for yawed flow, and the results were compared with aerodynamic measurements obtained in the MEXICO (Model Rotor Experiments under Controlled Conditions ) project on a wind turbine rotor placed in a large scale wind tunnel. In general, reasonable to good agreement was found between the BEM model and MEXICO data. When large yawmisalignments were imposed, poor agreement was found in the downstroke of the movement between the model and the experiment. Still, over a revolution the maximum normal force coefficient predicted was always within 8% of experimental data at the inboard stations, which is encouraging especially when blade fatigue calculations are being considered.

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Section: Discussionmentioning

confidence: 99%

Section: Modelling Dynamic Stall For Wind Turbinesmentioning

confidence: 99%

Validation of the Beddoes-Leishman Dynamic Stall Model for Horizontal Axis Wind Turbines using MEXICO data

Pereira

Schepers²,

Pavel

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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“…The Leishman-Beddoes model (LB) [22,23], which was further developed by Sheng et al [29], is used in this work. It is described in detail in [24], and the main principles of the model are reviewed here.…”

Section: Leishman-beddoes Modelmentioning

confidence: 99%

“…The experimental data on this turbine were chosen, because of its large scale size, which gives the Reynolds number Re > 1 × 10 6 . Two dynamic stall models are compared: the Gormont model, with the modifications of Massé and Berg, and the Leishman-Beddoes model, modified by Sheng et al [29].…”

Section: Introductionmentioning

confidence: 99%

Simulating Dynamic Stall Effects for Vertical Axis Wind Turbines Applying a Double Multiple Streamtube Model

Dyachuk

Goude

2015

Energies

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Abstract:The complex unsteady aerodynamics of vertical axis wind turbines (VAWT) poses significant challenges to the simulation tools. Dynamic stall is one of the phenomena associated with the unsteady conditions for VAWTs, and it is in the focus of the study. Two dynamic stall models are compared: the widely-used Gormont model and a Leishman-Beddoes-type model. The models are included in a double multiple streamtube model. The effects of flow curvature and flow expansion are also considered. The model results are assessed against the measured data on a Darrieus turbine with curved blades. To study the dynamic stall effects, the comparison of force coefficients between the simulations and experiments is done at low tip speed ratios. Simulations show that the Leishman-Beddoes model outperforms the Gormont model for all tested conditions.

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“…From this relationship a dynamic AOA is determined and the load coefficients are interpolated from the static data. Tran and Petot [19] Sheng et al [25] also proposed modifications to the B-L model for low Mach numbers, including a new stallonset criterion, a new modelling of the return from the stall state, a new version of the formula for chordwise force, and a revision of the dynamic vortex formation. In the prediction of ramp-up and oscillatory tests of both NACA 0012 and S809 airfoils, the modified model showed much better performance than the original model.…”

Section: Dynamic Stallmentioning

confidence: 99%

Vibration-induced aerodynamic loads on large horizontal axis wind turbine blades

et al. 2017

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The blades of a large Horizontal Axis Wind Turbine (HAWT) are subjected to significant vibrations during operation. The vibrations affect the dynamic flow field around the blade and consequently alter the aerodynamic forces on the blade. In order to better understand the influence of blade vibrations on the aerodynamic loads, the dynamic stall characteristics of an S809 airfoil undergoing translational motion as well as pitching motion were investigated using Computational Fluid Dynamics (CFD) techniques. Simulation results indicated that both the out-of-plane and in-plane translational motions of the airfoil affect the unsteady aerodynamic forces significantly. In order to investigate the effects of blade vibration on the aerodynamic load on a large-scale HAWT blade during its operating lifetime, an aerodynamic model based on the Blade Element-Momentum (BEM) theory and the Beddoes-Leishman (B-L) dynamic stall model was proposed. The BEM model was revised to account for the vibration-induced velocity components in the calculation of the effective angle of attack. Aerodynamic load analysis of a 5 MW wind turbine was then performed and the impact of blade vibration on the lifetime aerodynamic fatigue loads was analysed.

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A Modified Dynamic Stall Model for Low Mach Numbers

Cited by 27 publications

References 15 publications

Validation of the Beddoes-Leishman Dynamic Stall Model for Horizontal Axis Wind Turbines using MEXICO data

Validation of the Beddoes-Leishman Dynamic Stall Model for Horizontal Axis Wind Turbines using MEXICO data

Simulating Dynamic Stall Effects for Vertical Axis Wind Turbines Applying a Double Multiple Streamtube Model

Vibration-induced aerodynamic loads on large horizontal axis wind turbine blades

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