Akademik Veri Yönetim Sistemi
10th AIAA Atmospheric and Space Environments Conference, 2018, Georgia, Amerika Birleşik Devletleri, 25 - 29 Haziran 2018, (Tam Metin Bildiri)
Wind turbines could suffer severe aerodynamic penalties and unbalanced rotating mass caused by ice accretion when operation in cold climates. Electric resistance heating (RH) is one of the most commonly-used anti-icing strategies due to its high effectiveness and high product maturity. In the present study, a novel anti-icing strategy based on the traditional electric resistance heating, named “2RH”, is proposed to effectively control the energy consumption for the wind turbine anti-icing applications. This strategy is inspired by the unevenly distributed heat transfers in the stream-wise direction over the loaded wind turbine blades. Two resistance heating elements, i.e., the leading-edge one and the surface one, are utilized and individually controlled, instead of using a single heating element covering the entire blade surface. A series of experiments were conducted by using the Icing Research Tunnel available at Iowa State University (i.e., ISU-IRT) to estimate the heat transfer coefficients and to evaluate the anti-icing performance of the proposed “2RH” strategy under both wet and dry icing conditions. While a high-speed imaging system was utilized to record the dynamic anti-icing process, an infrared thermal imaging technique was implemented to quantitatively measure the temperature distributions over the blade surface during the anti-icing processes. The results show that the leading-edge (LE) region has a much stronger heat convection than that at downstream region, indicating a requirement of higher localized power input for the antiicing process. By using the proposed “2RH” strategy, approximately 50% of the total power consumptions was achieved under both wet and dry icing conditions. Due to the lower ambient temperature, a higher power input was required for the successful antiicing under the dry rime icing condition, in comparison those under the wet glaze icing conditions.