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Title:
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Field rotor aerodynamics: the rotating case
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Author(s):
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Published by:
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Publication date:
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ECN
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1996
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ECN report number:
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Document type:
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ECN-RX--96-067
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Other
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Number of pages:
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Full text:
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11
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Download PDF
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Abstract:
In order to improve the aerodynamic models which are implemented in windturbine design codes, basic aerodynamic quantities were measured at an
experimental wind turbine with a scale corresponding to commercial wind
turbines. The strong delay of stall at the inboard station and the weaker
delay of stall at the other stations which are observed under rotating
conditions for negative blade pitch angles are in agreement with the ones
measured at other facilities. This is in contrast to the pitch dependency of
the normal force coefficient at high angles of attack which is observed at
the inboard station. Apart form this pitch dependency, these measured results
are in agreement with the ones obtained on basis of theoretical work on the
effect of rotation. This opens the door to the application of 'steady'
rotational effects when designing a (stall-controlled) wind turbine rotor. 9
figs., 1 tab., 10 refs.
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