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Wind

TurbineBlade

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A.S!I AT$IA.S!I AT$I11C91A030211C91A0302

B.S$!A%ANB.S$!A%AN

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"any Di&eren'!('(rs)

KidWind r(*e+' ,---. id-ind.(rg

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Nu/ber ( Blades 2ne• !('(r /us' /( e /(re

ra4idly '( +a4'ure sa/ea/(un' ( -ind – Gearb( ra'i( redu+ed – Added -eig6' (

+(un'erbalan+e nega'ess(/e bene7's ( lig6'erdesign

– $ig6er s4eed /eans /(ren(ise8 isual8 and -ildli ei/4a+'s

• Blades easier '( ins'allbe+ause en'ire r('(r +anbe asse/bled (n gr(und• Ca4'ures 10 lessenergy '6an '-( bladedesign

• :l'i/a'ely 4r( ide n(+(s' sa ings

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Nu/ber ( Blades ; T-(• Ad an'ages <

disad an'ages si/ilar'( (ne blade

•Need 'ee'ering 6uband (r s6(+abs(rbers be+ause (gyr(s+(4i+i/balan+es

• Ca4'ure 5 lessenergy '6an '6reeblade designs

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Nu/ber ( Blades ; T6ree• Balan+e (

gyr(s+(4i+ (r+es• Sl(-er r('a'i(n

– in+reases gearb(< 'rans/issi(n+(s's

– "(re aes'6e'i+8less n(ise8 e-erbird s'ri es

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Blade C(/4(si'i(n

"e'al• S'eel

– $ea y < e 4ensi e• Alu/inu/

– Lig6'er;-eig6' andeasy '( -(r -i'6

– # 4ensi e – Sub*e+' '( /e'al

a'igue

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BladeC(ns'ru+'i(n

C!#2

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Air (il S6a4e =us' li e '6e -ings ( anair4lane8 -ind 'urbineblades use '6e air (ils6a4e '( +rea'e li ' and/a i/i>e e?+ien+y.

The Bernoulli Effect

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Li '@Drag (r+es# 4erien+ed by

Turbine Blades

KidWind r(*e+' ,---. id-ind.(rg

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Ti4;S4eed !a'i(

Ti4;s4eed ra'i( is '6e ra'i( ( '6es4eed ( '6e r('a'ing blade 'i4 '('6e s4eed ( '6e ree s'rea/-ind.

T6ere is an (4'i/u/ angle (a''a+ -6i+6 +rea'es '6e 6ig6es'li ' '( drag ra'i(.

Be+ause angle ( a''a+ isde4endan' (n -ind s4eed8 '6ereis an (4'i/u/ 'i4;s4eed ra'i(

!

%TSR =

Where,

= rotational speed in radians /sec

R = Rotor RadiusV = Wind “Free Stream” Velocity

!

R

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Be'> Li/i'All -ind 4(-er +ann('be +a4'ured by r('(r

(r air -(uld be+(/4le'ely s'illbe6ind r('(r and n('all(- /(re -ind '(4ass '6r(ug6.

T6e(re'i+al li/i' (r('(r e?+ien+y is59

"(s' /(dern -ind'urbines are in '6e35 5 range

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ANAL SIS

"#S$ING

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D# 2!"ATI2N IN ANS A

KidWind r(*e+' ,---. id-ind.(rg

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C2NCL:SI2NIn (ur 4r(*e+' -e 6a e designed a -ind

/ill blade -i'6 'ra4e>(idal s6a4e/(deled in 3D /(deling s( '-are

C!#2;E and '6en -e analy>e '6e -ind/ill blade -i'6 alu/inu/ all(y

/a'erials -i'6 6el4 ( e/

KidWind r(*e+' ,---. id-ind.(rg

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T6an (u