Numerical Investigation on the Noise Generation of ... - Winterwind

mustardarchaeologistMechanics

Feb 22, 2014 (3 years and 6 months ago)

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-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics

Numerical

Investigation

on

the

Noise

Generation

of

Iced

Wind

Turbines




R.
Hann
, A. Wolf, D.
Bekiropoulos
, T. Lutz, E. Krämer

Photo
: VTT

www.iag.uni
-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics



Noise may cause…


… annoyance


… psychological distress




insomnia

Trailing
-
edge (TE) noise is the
dominant noise source for
modern wind turbines.

www.iag.uni
-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics

www.iag.uni
-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics

Flow separation is
a possible noise
source at the
leading edge (LE).

Questions …


1)
Increase of trailing
-
edge noise




2)
Relevance of leading
-
edge noise

? ? ?

+ + +


www.iag.uni
-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics

LEWICE (NASA)

TAU
-
Code
(DLR)

PIANO
/
RNOISE

(DLR / IAG)

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stuttgart.de

IAG

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Aerodynamics


and

Gas Dynamics

See paper for more
information.

C
omputational
F
luid
D
ynamics (CFD)

C
omputational
A
ero
a
coustics

(CAA)

Validation
Results

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stuttgart.de

IAG

Institute
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Aerodynamics


and

Gas Dynamics

Institute
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Aerodynamics


and

Gas Dynamics

PIANO Results

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stuttgart.de

IAG

Logarithmic addition

Institute
of

Aerodynamics


and

Gas Dynamics

PIANO
Results

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stuttgart.de

IAG

Institute
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Aerodynamics


and

Gas Dynamics

PIANO
Results

www.iag.uni
-
stuttgart.de

IAG

Leading
-
edge
(LE) noise can
be neglected!

Radius = 50 m 2.5 MW Turbine

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2D simulations of TE
-
noise
with RNOISE on a generic
turbine blade.

RNOISE
Results

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stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics

RNOISE
Results

www.iag.uni
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stuttgart.de

IAG

Institute
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Aerodynamics


and

Gas Dynamics

+10 dB

+1.5 dB



Photo
: VTT

www.iag.uni
-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics


Icing increases noise


Trailing
-
edge noise is dominating


More work needs to be done!

www.iag.uni
-
stuttgart.de

IAG

Institute
of

Aerodynamics


and

Gas Dynamics



Photo
: VTT