Environmental Engineering Reference
In-Depth Information
x,.y.are.current.proile.coordinates.
Now.follows:
k.is.a.proile.coeficient.(Equation.(2.37))
2
27
16
λ
α β
e k
.
k =
(
)
2
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.
S
h
s
h
S
h
; q = 2 (G +
G )(
µ
+
µ
)
λ = G + G
E
Q
I
YZ
YZ
zy
zy
YZ
YZ
; b
=
.
S
h
s
h
+ E
E + E
2
XZ
XZ
z
z
2.11.1 
Experimental Investigation
We.selected.parameters:.α.=.2/3;.β.=.1/3;.e k. =.y.=.1;.x.=.2/3;.coeficients.of.anisot-
ropy.λ.means.relations.transverse.stiffness.to.longitudinal.stiffness.equals.0.2;.
q.=..010;.b.=.1.5;.external.dynamic.load.of.atmospheric.pressure.equals.1.kg/
m 2 ..Proile.coeficient.k.is.equal.to..189..Delection.is.calculated.equal.to.4.08.m..
Static.test.shows.delection.of.huge.iberglass.blades.equal.6.m.
2.11.2 
Conclusion
.
1.. Delection.of.huge.length.turbine.blades.can.be.determined.by.having.
the.structures.constructed.of.skin.iberglass.and.carbon.inner.webs.
.
2.. Stiffness.of.carbon.inner.webs.can.be.increased.by.reducing.delec-
tion.of.hybrid.turbine.blades.
References
.
1.. NASA.. 20. percent. wind. energy. by. 2030.. Online. at:. www.1.eere.energy.gov/
windandhydro/pdfs/41869pdf
.
2.. Ashwill..2004..Windpower-Wikipedia,.the.free.encyclopedia,.en.wikpedia.org/
wiki/wind_power.
.
3.. Pagano,.N..J..and.S..R..Soni..1988..Strength.analysis.of.composite.turbine.blades..
Journal of Reinforced Plastics and Composites .7(6):.558-581.
 
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