An Integrated Numerical and Experimental Study of Wind-Driven Water Film Flow Dynamics Pertinent to Wind Turbine Icing Phenomena
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1.A numerical study on wind-driven runback characteristics of a thin water film flow over a solid surface
- 关键词:
- Multiphase flow simulation; Water transport over wing surfaces; Glazeice accretion process; Volume of fluid method;AIRCRAFT; WAVES; GLAZE
- Wang, Jincheng;He, Ping;Hu, Hui
- 《ACTA MECHANICA SINICA》
- 2026年
- 42卷
- 1期
- 期刊
An unsteady numerical simulation is conducted to examine the dynamic runback characteristics of a water film flow driven by a boundary layer airflow over a solid surface pertinent to the dynamic glaze ice accretion process over aircraft wing surfaces. The multiphase flow simulation results of the wind-driven water runback (WDWR) flow are compared quantitatively with the experimental results in terms of the time-dependent variations of the water film thickness profiles and evolution of the front contact point of the runback water film flow. The underlying mechanism of the intermittent water runback behavior is elucidated by analyzing the time evolution of the airflow velocity and vorticity fields above the runback water film flow over the solid surface. To the best knowledge of the authors, the work presented here is the first successful attempt to numerically examine the transient runback characteristics of WDWR flows. It serves as an excellent benchmark case for the development of best practices to model the important micro-physical processes responsible for the transient water transport over aircraft wing surfaces.
...2.An experimental study on ice accretion characteristics and icing-induced aerodynamic penalties to offshore wind turbines
- 关键词:
- Aerodynamics;Glazes;Ice;Offshore oil well production;Turbine components;Turbomachine blades;Wetting;Ice accretion;Ice accretion on turbine blade;Icing-induced performance degradation to wind turbine;Liquid water content;Offshore wind turbine icing;Offshore winds;Performance degradation;Sea spray;Sea spray icing;Turbine blade
- Sista, Harsha;Hu, Haiyang;Hu, Hui
- 《Renewable Energy》
- 2026年
- 256卷
- 期
- 期刊
An experimental study was conducted to characterize the dynamic ice accretion process and icing-induced aerodynamic penalties to offshore wind turbines under highly wetted icing environments during sea spray icing events. A turbine blade model was exposed to frozen-cold airflows with the Liquid Water Content levels up to 10.0 g/m3 and ambient temperatures down to −15.0 °C. Ice accretion characteristics under highly wetted icing environments were found to be significantly different from those of the onshore turbine icing scenarios with much lower Liquid Water Content levels. While a typical rime icing process was found to be experienced by onshore wind turbines at the cold temperature of −15.0 °C, mixed or even glaze icing processes occurred over the blade surfaces of offshore wind turbines due to the much higher wetted icing environments. The aerodynamic penalties induced by the mixed and glaze ice accretion were found to be significantly greater (i.e., up to 15 % more accreted ice mass, 85 % less lift, and 150 % more drag) than the rime icing scenario. However, at a "warmer" icing temperature of −5.0 °C, the glaze icing process over blade surfaces under highly wetted icing environments was accompanied by significant runback of unfrozen water, causing smaller aerodynamic penalties to offshore wind turbines. © 2025 Elsevier Ltd
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