Design Wind Power Turbine - Hybrid Anisotropic Materials for Wind Power Turbine Blades - page 43

Here:
e k. is.a.maximum.height.of.proile;
.α.is.a.distance.from.axis.x.to.exit.edge;
.β.is.a.distance.from.axis.x.to.entry.edge;
.L.is.a.length.of.proile.(α.+.β);
.λ.is.a.coeficient.of.anisotropy.

All.the.designations.are.given.in.Figure 2.20.
The.minimum.set.was.determined.from.Equation.(2.35).

. S'(y).=.(y.-.α)(3y.-.2β.-.α).=.0. (2.38)

The.abscissa.of.maximum.is.a.root.of.Equation.(2.38).
Minimizing.the.optimal.number.of.inner.webs.for.two.in.each.section.is.
possible.when.we.analyze.the.shear.stresses.
Figure 2.18.indicates.carbon.iber.tape.on.unsupported.leading.edge.

2 β + α .

y m =

. (2.39)

3

Obviously,.the.height.of.the.contour.would.be.one-third.the.length.from.
the.entrance.edge.(see.Figure 2.18).

ek

a

b

L

Dimensions of root section of wind turbine blades

FIGURE 2.20
Dimensions.of.root.section.of.wind.turbine.blade..