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| Titel |
Cup anemometer response to the wind turbulence-measurement of the horizontal wind variance |
| VerfasserIn |
S. Yahaya, J. P. Frangi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 10 ; Nr. 22, no. 10 (2004-11-03), S.3363-3374 |
| Datensatznummer |
250015016
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| Publikation (Nr.) |
 copernicus.org/angeo-22-3363-2004.pdf |
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| Zusammenfassung |
| This paper presents some dynamic characteristics of an opto-electronic cup
anemometer model in relation to its response to the wind turbulence. It is
based on experimental data of the natural wind turbulence measured both by
an ultrasonic anemometer and two samples of the mentioned cup anemometer. The
distance constants of the latter devices measured in a wind tunnel are in
good agreement with those determined by the spectral analysis method
proposed in this study. In addition, the study shows that the linear
compensation of the cup anemometer response, beyond the cutoff frequency,
is limited to a given frequency, characteristic of the device. Beyond this
frequency, the compensation effectiveness relies mainly on the wind
characteristics, particularly the direction variability and the horizontal
turbulence intensity. Finally, this study demonstrates the potential of fast
cup anemometers to measure some turbulence parameters (like wind variance)
with errors of the magnitude as those deriving from the mean speed
measurements. This result proves that fast cup anemometers can be used to
assess some turbulence parameters, especially for long-term measurements in
severe climate conditions (icing, snowing or sandy storm weathers). |
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