Design of a small horizontal axis wind turbine hawt
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Design of a small horizontal axis wind turbine, HAWT. Design parameters. Power Output, P:300 W Wind velocity, c:8 m/s Tip Speed Ratio, TSR:5 Assumed efficiency, h :30 % Number of blades, z:2 Wing profile:NACA 23015 Angle of attack, a: 8 o

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Design of a small horizontal axis wind turbine, HAWT

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Design of a small horizontal axis wind turbine hawt

Design of a small horizontal axis wind turbine, HAWT


Design parameters

Design parameters

  • Power Output, P:300 W

  • Wind velocity, c:8 m/s

  • Tip Speed Ratio, TSR:5

  • Assumed efficiency, h:30 %

  • Number of blades, z:2

  • Wing profile:NACA 23015

  • Angle of attack, a:8o

  • Lift coefficient, CL:0,8

  • Drag coefficient, CD:0,01


Radius of the turbine

Radius of the turbine

D

Where:

A=Area[m2]

c=Wind velocity[m/s]

h=Efficiency[ - ]

P=Power[W]

r=Density[kg/m3]

R=Radius[m]


Speed of the turbine

Speed of the turbine

w

Where:

c=Wind velocity[m/s]

n=Speed[rpm]

w=Angular velocity[rad/s]

R=Radius[m]


Power through a section of the turbine blade

dA

dr

r

Power through a section of the turbine blade


Torque force d f t from a section of the turbine blade

Torque force, dFT from a section of the turbine blade

dFT

dA

dr

r


Wing profile

Wing profile

Chord Length, Lchord


Design of a small horizontal axis wind turbine hawt

FL

FD

a

v

LChord

4

Where:

A=Area[m2]

a=Angle of attack[degrees]

CD=Drag Coefficient[ - ]

CL=Lift Coefficient[ - ]

FD=Drag Force[N]

FL=Lift Force[N]

LChord=Chord Length[m]

r=Density[kg/m3]

V=Relative velocity[m/s]


Design of a small horizontal axis wind turbine hawt

Peripheral velocity

Wind velocity = c

Relative velocity = V

V

u

c

u

w


Design of a small horizontal axis wind turbine hawt

FL

FD

u = w·r

a

q

v

c


Design of a small horizontal axis wind turbine hawt

F

FL

FD

F

a

u = w·r

q

F

v

u

c

v

c


Design of a small horizontal axis wind turbine hawt

F

u

v

c

F

a

u = w·r

q

F

v

FL(Torque)

FL

c

FD

FD(Torque)


Design of a small horizontal axis wind turbine hawt

F

a

u = w·r

q

F

v

FT

FL

c

FD


Design of a small horizontal axis wind turbine hawt

FT

v


Chord length l chord

u

F

v

c

Chord Length, Lchord

Lchord


Output data

Output data


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