An improved tip-loss correction based on vortex code results

Emmanuel Branlard; Kristian Dixon; Mac Gaunaa

An improved tip-loss correction based on vortex code results

Emmanuel Branlard
, Kristian Dixon
, Mac Gaunaa

Siemens Energy Inc.

Research output: Contribution to conference › Poster › Research › peer-review

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Abstract

Standard blade element momentum(BEM) codes
use Prandtl’s tip-loss correction which relies on simplified
vortex theory under the assumption of optimal
operating condition and no wake expansion. A
new tip-loss correction for implementation in BEM
codes has been developed using a lifting-line code
to account for the effect of wake expansion, roll-up
and distortion under any operating conditions. A
database of tip-loss corrections is established for further
use in BEM codes. Using this model a more
physical representation of the flow and hence a better
assessment of the performance of the turbine by
BEM codes is expected.

Original language	English
Publication date	2012
Number of pages	1
Publication status	Published - 2012
Event	EWEC 2012 - European Wind Energy Conference & Exhibition - Copenhagen, Denmark Duration: 16 Apr 2012 → 19 Apr 2012 http://events.ewea.org/annual2012/

Conference

Conference	EWEC 2012 - European Wind Energy Conference & Exhibition
Country/Territory	Denmark
City	Copenhagen
Period	16/04/2012 → 19/04/2012
Internet address	http://events.ewea.org/annual2012/

Keywords

Tip-loss factor
Tip-loss correction
Vortex methods
Improved BEM
Bézier curve
Wake deformation
EWEA 2012

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title = "An improved tip-loss correction based on vortex code results",

abstract = "Standard blade element momentum(BEM) codes use Prandtl{\textquoteright}s tip-loss correction which relies on simplified vortex theory under the assumption of optimal operating condition and no wake expansion. A new tip-loss correction for implementation in BEM codes has been developed using a lifting-line code to account for the effect of wake expansion, roll-up and distortion under any operating conditions. A database of tip-loss corrections is established for further use in BEM codes. Using this model a more physical representation of the flow and hence a better assessment of the performance of the turbine by BEM codes is expected.",

keywords = "Tip-loss factor, Tip-loss correction, Vortex methods, Improved BEM, B{\'e}zier curve, Wake deformation, EWEA 2012",

author = "Emmanuel Branlard and Kristian Dixon and Mac Gaunaa",

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language = "English",

note = "EWEC 2012 - European Wind Energy Conference \& Exhibition, EWEC 2012 ; Conference date: 16-04-2012 Through 19-04-2012",

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TY - CONF

T1 - An improved tip-loss correction based on vortex code results

AU - Branlard, Emmanuel

AU - Dixon, Kristian

AU - Gaunaa, Mac

PY - 2012

Y1 - 2012

N2 - Standard blade element momentum(BEM) codes use Prandtl’s tip-loss correction which relies on simplified vortex theory under the assumption of optimal operating condition and no wake expansion. A new tip-loss correction for implementation in BEM codes has been developed using a lifting-line code to account for the effect of wake expansion, roll-up and distortion under any operating conditions. A database of tip-loss corrections is established for further use in BEM codes. Using this model a more physical representation of the flow and hence a better assessment of the performance of the turbine by BEM codes is expected.

AB - Standard blade element momentum(BEM) codes use Prandtl’s tip-loss correction which relies on simplified vortex theory under the assumption of optimal operating condition and no wake expansion. A new tip-loss correction for implementation in BEM codes has been developed using a lifting-line code to account for the effect of wake expansion, roll-up and distortion under any operating conditions. A database of tip-loss corrections is established for further use in BEM codes. Using this model a more physical representation of the flow and hence a better assessment of the performance of the turbine by BEM codes is expected.

KW - Tip-loss factor

KW - Tip-loss correction

KW - Vortex methods

KW - Improved BEM

KW - Bézier curve

KW - Wake deformation

KW - EWEA 2012

M3 - Poster

T2 - EWEC 2012 - European Wind Energy Conference & Exhibition

Y2 - 16 April 2012 through 19 April 2012

ER -

An improved tip-loss correction based on vortex code results

Abstract

Conference

Keywords

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