风力机碳纤维叶片表面冰层粘结特性试验研究

Experimental Research on Adhesive Characteristic of Icing on Carbon Fiber Blade for Wind Turbine

风力机叶片表面结冰会破坏叶片翼型轮廓,降低风力机发电效率。因此,开展冰层粘结特性研究可以为风力机防除冰技术研究提供参考依据。基于风力机叶片复合材料的特点,选取型号为T300的碳纤维平板为研究对象,开展表面冰层粘结特性研究。研制了一款粘结力测量装置,提出并制定了结冰样件的制作方法,探究了结冰时长、基体温度及厚度对碳纤维表面冰层粘结特性的影响。试验结果表明,结冰时长对碳纤维表面冰层切向粘结强度的影响较小;液态水通过碳纤维基体与低温环境的传热过程越慢,冰层切向粘结强度越大;传热过程中,基体材料膨胀与收缩的形变量越小,冰层切向粘结强度越高。该研究结果为深入开展风力机防除冰技术研究提供试验基础。

Ice accretion on the blade surface of wind turbine changes the airfoil profile of blade and decreases the power efficiency.Therefore,exploring the adhesive characteristic of icing on blade surface can provide a reference for developing deicing technology of wind turbine.According to the materials of most wind turbine blades,a plate made of carbon fiber,T300,was selected as research object to carry out experimental research on adhesive characteristic of ice.A device used to measure the ice adhesive strength was developed,and a scheme of manufacturing iced plate was proposed.After that,the effects of icing time,plate temperature and plate thickness on the adhesive characteristic of ice were tested.The experimental results show that icing time has less effect on adhesive strength of ice.In the icing process,lower the heat transfer rate was,higher the adhesive strength of ice was.For the plate substrate,smaller the amounts of inflation and contraction were,higher the adhesive strength of ice was.The research findings provide an experimental foundation for in-depth researches on anti-icing and deicing technologies of wind turbine.