TY - GEN

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

A1 - Branlard,Emmanuel Simon Pierre

A1 - Dixon,Kristian

A1 - Gaunaa,Mac

AU - Branlard,Emmanuel Simon Pierre

AU - Dixon,Kristian

AU - Gaunaa,Mac

PB - EWEA - The European Wind Energy Association

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<br/>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<br/>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<br/>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<br/>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<br/>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<br/>BEM codes is expected.

KW - Tip-loss factor

KW - Tip-loss correction

KW - Vortex methods

KW - Improved BEM

KW - Bézier curve

KW - Wake deformation

BT - Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition

T2 - Proceedings of EWEA 2012 - European Wind Energy Conference & Exhibition

ER -