000014775 001__ 14775
000014775 005__ 20161115100201.0
000014775 04107 $$aeng
000014775 046__ $$k2016-08-21
000014775 100__ $$aWood, David
000014775 24500 $$aThe Use of Helical Vortex Solutions in Wind Turbine Performance Analysis

000014775 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014775 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014775 506__ $$arestricted
000014775 520__ $$2eng$$aThe exact solutions for the velocities induced by helical line vortices are applied to two related aspects of wind turbine performance analysis. First it is shown that they allow the determination of the “tip loss factor” which relates the velocities at the blades to the average velocity at the same radius. The new calculation of tip loss is shown to be suitable for the computational modeling of wind turbine performance and is more accurate than the simple approximation due to Prandtl that is commonly used. Second, the conservation equations for momentum and angular momentum are nonlinear so the azimuthal variation of the induced velocities can be important. The exact solutions are used to determine the nonlinear terms in the torque and thrust equations. Approximate forms for the nonlinear terms are developed.

000014775 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014775 653__ $$a

000014775 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014775 720__ $$aWood, David
000014775 8560_ $$ffischerc@itam.cas.cz
000014775 8564_ $$s96039$$uhttps://invenio.itam.cas.cz/record/14775/files/TS.FM15-4.04.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1542, code TS.FM15-4.04
.
000014775 962__ $$r13812
000014775 980__ $$aPAPER