Blade element momentum modeling of inflow with shear in comparison with advanced model results

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Blade element momentum modeling of inflow with shear in comparison with advanced model results. / Aagaard Madsen, Helge; Riziotis, V.; Zahle, Frederik; Hansen, Martin Otto Laver; Snel, H.; Grasso, F.; Larsen, Torben J.; Politis, E.; Rasmussen, Flemming.

In: Wind Energy, Vol. 15, No. 1, 2012, p. 63-81.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Aagaard Madsen, Helge; Riziotis, V.; Zahle, Frederik; Hansen, Martin Otto Laver; Snel, H.; Grasso, F.; Larsen, Torben J.; Politis, E.; Rasmussen, Flemming / Blade element momentum modeling of inflow with shear in comparison with advanced model results.

In: Wind Energy, Vol. 15, No. 1, 2012, p. 63-81.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{0fdec906c8704180abf882cb97fbc91c,
title = "Blade element momentum modeling of inflow with shear in comparison with advanced model results",
keywords = "Aeroelastic design methods, Aeroelastiske designmetoder",
publisher = "John/Wiley & Sons Ltd.",
author = "{Aagaard Madsen}, Helge and V. Riziotis and Frederik Zahle and Hansen, {Martin Otto Laver} and H. Snel and F. Grasso and Larsen, {Torben J.} and E. Politis and Flemming Rasmussen",
year = "2012",
doi = "10.1002/we.493",
volume = "15",
number = "1",
pages = "63--81",
journal = "Wind Energy",
issn = "1095-4244",

}

RIS

TY - JOUR

T1 - Blade element momentum modeling of inflow with shear in comparison with advanced model results

A1 - Aagaard Madsen,Helge

A1 - Riziotis,V.

A1 - Zahle,Frederik

A1 - Hansen,Martin Otto Laver

A1 - Snel,H.

A1 - Grasso,F.

A1 - Larsen,Torben J.

A1 - Politis,E.

A1 - Rasmussen,Flemming

AU - Aagaard Madsen,Helge

AU - Riziotis,V.

AU - Zahle,Frederik

AU - Hansen,Martin Otto Laver

AU - Snel,H.

AU - Grasso,F.

AU - Larsen,Torben J.

AU - Politis,E.

AU - Rasmussen,Flemming

PB - John/Wiley & Sons Ltd.

PY - 2012

Y1 - 2012

N2 - There seems to be a significant uncertainty in aerodynamic and aeroelastic simulations on megawatt turbines operating in inflow with considerable shear, in particular with the engineering blade element momentum (BEM) model, commonly implemented in the aeroelastic design codes used by industry. Computations with advanced vortex and computational fluid dynamics models are used to provide improved insight into the complex flow phenomena and rotor aerodynamics caused by the sheared inflow. One consistent result from the advanced models is the variation of induced velocity as a function of azimuth when shear is present in the inflow. This gives guidance to how the BEM modeling of shear should be implemented. Another result from the advanced vortex model computations is a clear indication of influence of the ground, and the general tendency is a speed up effect of the flow through the rotor giving a higher power than in uniform flow. On the basis of the consistent azimuthal induction variations seen in the advanced model results, three different BEM implementation methods are discussed and tested in the same aeroelastic code. A full local BEM implementation on an elemental stream tube in both azimuth and radial direction seems to be closest to the advanced model results. Copyright © 2011 John Wiley & Sons, Ltd.

AB - There seems to be a significant uncertainty in aerodynamic and aeroelastic simulations on megawatt turbines operating in inflow with considerable shear, in particular with the engineering blade element momentum (BEM) model, commonly implemented in the aeroelastic design codes used by industry. Computations with advanced vortex and computational fluid dynamics models are used to provide improved insight into the complex flow phenomena and rotor aerodynamics caused by the sheared inflow. One consistent result from the advanced models is the variation of induced velocity as a function of azimuth when shear is present in the inflow. This gives guidance to how the BEM modeling of shear should be implemented. Another result from the advanced vortex model computations is a clear indication of influence of the ground, and the general tendency is a speed up effect of the flow through the rotor giving a higher power than in uniform flow. On the basis of the consistent azimuthal induction variations seen in the advanced model results, three different BEM implementation methods are discussed and tested in the same aeroelastic code. A full local BEM implementation on an elemental stream tube in both azimuth and radial direction seems to be closest to the advanced model results. Copyright © 2011 John Wiley & Sons, Ltd.

KW - Aeroelastic design methods

KW - Aeroelastiske designmetoder

U2 - 10.1002/we.493

DO - 10.1002/we.493

JO - Wind Energy

JF - Wind Energy

SN - 1095-4244

IS - 1

VL - 15

SP - 63

EP - 81

ER -