CAREER: Offshore Wind Turbines Subjected to Hurricanes: Simulation of Wind-Wave-Structure Interaction and Aerodynamic Load Reduction

该学院早期职业发展(CALEAR)项目的研究目标是调查海上风力涡轮机在飓风负载下的行为，并开发能够减少损害的新方法。具体的研究活动包括：(1)建立考虑波浪、风、土壤和结构相互作用的时域分析程序；(2)研究风力涡轮机在与飓风现场观测一致的载荷下的行为；(3)设计一种压电式表面驱动机制，以空气动力学地减少风力；以及(4)探索结构的重新配置，以减少阻力。新的风电塔架的时间域公式将与由国家可再生能源实验室快速开发和维护的涡轮机分析程序整合在一起。将利用最近对飓风特征的现场观测来确定负荷。还将进行缩尺模型的风洞测试，以获得数值模拟所需的参数，并量化压电式表面致动在减小阻力方面的效果。海上风电场具有巨大的能源潜力，但主要问题之一是风力涡轮机在飓风中的脆弱性。该项目的成果可以降低飓风对风力涡轮机结构的风险，并有助于更广泛地采用海上风能。首席调查员将与国家可再生能源实验室合作，使更广泛的受众能够获得研究成果。该研究项目通过本科生和研究生的参与，以及通过学院与一个为少数群体服务的机构的伙伴关系，让代表不足的学生参与，将研究项目与教育结合起来。为了增加在可再生能源领域工作的工程师数量，将利用全校可再生能源合作和佛罗里达州立大学(FSU)远程学习办公室。该项目的外延将包括高中生通过FSU青年学者计划参与研究。在KidWind的帮助下，将为K-12教师提供年度研讨会。通过这些工作坊，教师将开发有关风能的教学模块，以加强他们的科学课程。

The research objectives of this Faculty Early Career Development (CAREER) project are to investigate the behavior of offshore wind turbines subjected to hurricane loads and to develop novel approaches that can reduce the damage. Specific research activities include: (1) to establish a time-domain analysis procedure that considers interactions of wave, wind, soil, and structure; (2) to study the behavior of wind turbine using the loading consistent with the field observations of hurricanes; (3) to devise a piezoelectric surface actuation mechanism to aerodynamically reduce the wind forces; and (4) to explore the reconfiguration of the structure to reduce the drag forces. The new time-domain formulation of the wind turbine tower will be integrated with the turbine analysis program FAST developed and maintained by the National Renewable Energy Laboratory. Recent field observations of hurricane characteristics will be utilized to define the loading. Wind tunnel testing of scaled models will also be conducted to obtain necessary parameters for numerical simulation, and to quantify the effects of the piezoelectric surface actuation in reducing the drag forces.Offshore wind farms have enormous energy potential, yet one of the major concerns is vulnerability of wind turbines in hurricanes. The results of this project can reduce risk to wind turbine structures in hurricanes and can contribute to wider adoption of the offshore wind energy. The Principal Investigator will collaborate with the National Renewable Energy Laboratory so that the research outcome is accessible to a wider audience. The research project is integrated with education through involvement of undergraduate and graduate students as well as involvement of underrepresented students through the college's partnership with a minority-serving institution. In order to increase the number of engineers who can work in renewable energy field, college-wide collaboration in renewable energy and the Florida State University (FSU) Office of Distance Learning will be utilized. The outreach of this project will involve high school students in research through the FSU Young Scholars Program. Annual workshops for K-12 teachers will be offered with the help of KidWind. Through these workshops, the teachers will develop teaching modules on wind energy to enhance their science curricula.