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High Humidity Aerodynamic Effects Study on Offshore Wind Turbine Airfoil/Blade Performance Through CFD Analysis

[+] Author Affiliations
Xue Yu

CDT Science and Technology Research Institute, Beijing, China

Liu Yan

North China Electric Power University, Beijing, China

Paper No. GT2017-63129, pp. V009T49A001; 12 pages
doi:10.1115/GT2017-63129
From:
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 9: Oil and Gas Applications; Supercritical CO2 Power Cycles; Wind Energy
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5096-1
  • Copyright © 2017 by ASME

abstract

Damp air with high humidity combined with foggy, rainy weather as well as icing in winter weather often found to cause turbine performance degradation, and it is more concerned with off-shore wind farm development. To address and understand the high humidity effects on wind turbine performance, our study has been conducted with spread sheet analysis on damp air properties investigation for air density and viscosity, then CFD modeling study using Fluent were carried out on Airfoil and Blade aerodynamic performance effects investigation due to water vapor partial pressure of mixing flow and water condensation around leading edge and trailing edge of airfoil. It is found that the high humidity effects with water vapor mixing flow and water condensation thin film around airfoil may have insignificant effect directly on airfoil/blade performance; however the indirect effects such as blade contamination and icing due to the water condensation may have significant effects on turbine performance degradation. Also found the foggy weather with micro water droplet (including rainy weather) may cause higher drag that lead to turbine performance degradation. It is found that at high temperature, the high humidity effect on air density cannot be ignored for annual energy production calculation. As qualitative validation, the CFD result was compared and correlated with field observation in foggy day of cold weather. The blade contamination and icing phenomenon need to be further investigated in the future study, and blade surface properties such as high surface energy coating effects on water condensation and icing will be investigated for anti-icing coating agent development.

Copyright © 2017 by ASME

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