Abstract
To investigate the temperature effect on characteristics of icing distribution near the tip part of rotating blade of large-scale horizontal-axis wind turbine, numerical simulations were carried out on a horizontal-axis wind turbine rotor with rated power of 1.5 MW based on a quasi-three-dimensional computational method developed in this study. The icing simulation was focused on the part between blade tip and 30% length of blade from tip along span wise to blade root where the most serious icing area is according to the past researches. Eight sections along blade were selected, and the ice accretion on each airfoil was calculated. Eight temperature values from −6°C to −20°C were decided to investigate the effects of temperature on icing under the certain liquid water content and medium volume droplet. Three icing times were selected to research the ice accretion on blade surface with the increase in the time. According to the results, the icing distribution has the overall characteristics that the icing shape changes from horn icing shape to streamline icing shape with decrease in the temperature. The closer the blade airfoil section to blade tip, the more obvious the ice accretion is. This study can be a reference for the research on anti-icing and de-icing technologies for large-scale horizontal-axis wind turbine.
Highlights
Wind energy, as a main kind of green and renewable energy, has been greatly developed and utilized in the world benefiting from the progress of research and successful commercialization
It is observed that horn icing shape occurs at the temperatures between 26°C and 214°C, and streamline icing shape occurs at the temperature of 220°C
The icing shapes have the typical characteristics of both the horn shape and streamline shape when the temperature is between 216°C and 218°C
Summary
As a main kind of green and renewable energy, has been greatly developed and utilized in the world benefiting from the progress of research and successful commercialization. We carried out further research on the temperature effect on icing distribution at the part from blade tip to 30% length where the most serious icing area is.
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