Insects Cause Double Stall
- Topics:
- Civil and Environmental
- Tags:
- Blade,
- Blade Servers,
- Energy Research Centre Of The Netherlands,
- Hardware,
- Hypotheses,
- Servers,
- Utility Computing
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Overview: Several large commercial wind turbines demonstrate drops in maximum power levels up to 45%, under apparently equal conditions. A number of hypotheses was formulated, three of which were useful. By performing stall flag measurements, as well as two other experiments, one of the three hypotheses was confirmed: the Insect Hypothesis. Insects only fly in low wind, impacting near the leading edge of the blade. In low wind conditions, the 'insect roughness' has little influence on profile performance and power is not affected. In high winds, however, the flow pattern around the blade has changed, and contamination on the leading edge now has a market affect, resulting in power drop.
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Format: PDF | Size: 185KB | Date: Sep 2001 | Pages: 4
