基于超声微振动的平板防冰风洞实验研究

摘要

In order to develop the anti-icing and de-icing methods of blade based on ultrasonic vibration, the experiments of icing on aluminum plate have been carried out in an icing tunnel which is constructed based on a wind tunnel utilizing low outdoor temperature.In the experiments, distributions and thicknesses of icing have been tested and the influences of ultrasonic vibration in different frequencies on distributions and thicknesses of icing have been studied and analyzed.The results show that the ultrasonic vibration can improve roughness and prohibit thickness of icing.When the vibration frequencies are 25.6 kHz and 33 kHz, the effect on prohibiting thickness of icing is remarkable.The prohibit rates are 26.88% and 23.7%, respectively.It validates that ultrasonic vibration can prohibit the rate of icing on aluminum plate to a certain extent.It provides a theoretical and experimental basis to anti-icing and de-icing of wind turbine blade by ultrasonic vibration.%为了开发基于超声微振动的风力机叶片防除冰技术,对铝制平板进行了风洞结冰试验研究.试验在利用自然低温的结冰风洞中进行,以铝板表面的结冰分布与结冰厚度为主要参数,测试了不同超声波频率产生的微振动对铝板结冰分布情况与结冰厚度的影响.结果表明:超声微振动可以降低结冰表面的粗糙度和结冰厚度;当振动频率为25.6 kHz和33 kHz时,抑制铝板结冰的效果较好,结冰厚度的抑制率分别为26.88%和23.7%,验证了超声波微振动可在一定程度上抑制铝板结冰生长,为超声微振动法在风力机叶片防除冰领域的应用提供了理论和实验基础.