DTU Wind EneTIiIY II--S Uolpartment of Wind EnerlilY

Experimental invesl!gatio~ of ice accretion on wind turbine . .....-1f.l~~rn~ltiOJI!,!rW~rl.d Energy.COI1!fer!!!'CE

• Climatic wind tunnel with icing conditions at Force Te,chrlOllo( in Kgs. Lyngby, Denmark

• Naca 64-618 profile - from LM Wind Power • Different angles of attack and temperature • Glaze and mix ice tests • MVD-25 micron • Ice accretion for 60 minutes ,-

• Re=900.000 - 1.000.000

- profiles profile 0' = 00

Iced profile - Glaze

o 0.2 OA 0.6 0.8 1

Iced profile - Mix

0.2 0.4 0.6

Lift Coeffic ients as a Function of T ime - Glaze '"'"

3000

2500

·WeighL of AccreLed Ice as a Funct ion of T ime - Glaze

<

et = 0"

, et = 4"

c o _ ~

, et = 9"

Lift Coefficients as a Function of Time - Mix

o

••

.,

•

_0.2 L __ ~ __ ~ __ ~ ___ ~ __ ~ __ ~ o 10 20 40 ~ 60

4000 Weight of Accreted Ice as a Punction of T ime - Mix

3500

JOOO

2500

1000

''"

o

•

_50o L __ ~ ___ ~ __ ~ ___ ~ __ ~ ___ ~ o 10 20 30

Time

"~

, "~

0 " ~ , 0 -

Linear ice accretion Dramatic lift coefficient degradation Most amount of ice accretion and least decrease in Cl for 9 deg AOA - glaze tests

I. Least amount of ice accretion and most decrease in CL for 0 AOA :;..~. - _ .... \li.".-. ""-

. -

Further plans:

• Include rime ice tests • Comparison of the three different ice tVDles! • Numerical analysis of the profiles